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  2. Privacy Policy

Privacy Policy

Your privacy is important to us. This policy explains how we collect, use, and protect your information.

Last updated: February 25, 2026

1. Information We Collect

1.1 Information You Provide

When you use our contact form or subscribe to our newsletter, we may collect:

  • Your name and email address
  • Messages or inquiries you send to us
  • Any other information you voluntarily provide

1.2 Information We Do NOT Collect

We want to be clear about what we don't collect:

  • Calculator inputs or results: We do not store any numbers, angles, or calculations you enter into our tools
  • Personal identification: We do not require accounts or track individual users
  • Location data: We do not collect precise location information
  • Device information: We do not collect device identifiers or detailed system information

1.3 Automatic Information

Like most websites, we automatically collect certain technical information:

  • IP address (anonymized for analytics)
  • Browser type and version
  • Operating system
  • Pages visited and time spent on site
  • Referring website

2. How We Use Your Information

2.1 Primary Uses

We use the information we collect to:

  • Respond to your inquiries and provide customer support
  • Send newsletters or updates (only if you subscribe)
  • Improve our website and calculators
  • Monitor and analyze website usage patterns
  • Ensure the security and proper functioning of our services

2.2 Analytics and Improvement

We use anonymized data to understand how our tools are used, which helps us:

  • Identify and fix technical issues
  • Improve calculator accuracy and performance
  • Develop new tools based on user needs
  • Optimize website speed and usability

3. Information Sharing and Disclosure

3.1 We Do Not Sell Your Data

We do not sell, rent, or trade your personal information to third parties for marketing purposes.

3.2 Limited Sharing

We may share your information only in these specific circumstances:

  • Service Providers: With trusted third-party services that help us operate our website (hosting, analytics, email delivery)
  • Legal Requirements: When required by law, court order, or government regulation
  • Safety and Security: To protect the rights, property, or safety of our users or the public
  • Business Transfer: In the event of a merger, acquisition, or sale of assets

3.3 Third-Party Services

Our website may use these third-party services:

  • Google Analytics: For website usage statistics (anonymized)
  • Email Service: For newsletter delivery and contact form responses
  • Hosting Provider: For website infrastructure and security

4. Cookies and Tracking

4.1 Essential Cookies

We use essential cookies that are necessary for the website to function properly:

  • Session cookies for form security
  • Preference cookies for user settings
  • Security cookies to prevent abuse

4.2 Analytics Cookies

We use analytics cookies to understand how visitors use our site. These cookies:

  • Collect anonymized usage data
  • Help us improve website performance
  • Do not identify individual users
  • Can be disabled in your browser settings

4.3 Managing Cookies

You can control cookies through your browser settings. However, disabling cookies may affect website functionality.

5. Data Security

5.1 Security Measures

We implement various security measures to protect your information:

  • SSL encryption for data transmission
  • Secure hosting infrastructure
  • Regular security updates and monitoring
  • Access controls and authentication
  • Data backup and recovery procedures

5.2 Data Retention

We retain your information only as long as necessary:

  • Contact inquiries: Up to 2 years for support purposes
  • Newsletter subscriptions: Until you unsubscribe
  • Analytics data: Anonymized and retained for 26 months
  • Calculator data: Not stored or retained

6. Your Rights and Choices

6.1 Access and Control

You have the right to:

  • Access the personal information we have about you
  • Correct inaccurate or incomplete information
  • Delete your personal information
  • Unsubscribe from newsletters at any time
  • Opt out of non-essential data collection

6.2 GDPR Rights (EU Residents)

If you're in the European Union, you have additional rights:

  • Right to data portability
  • Right to restrict processing
  • Right to object to processing
  • Right to lodge a complaint with supervisory authorities

6.3 CCPA Rights (California Residents)

California residents have the right to:

  • Know what personal information is collected
  • Delete personal information
  • Opt out of the sale of personal information
  • Non-discrimination for exercising privacy rights

7. Children's Privacy

Our website is designed for general audiences and educational use. We do not knowingly collect personal information from children under 13. If we become aware that we have collected information from a child under 13, we will delete it immediately.

Parents and guardians are encouraged to monitor their children's internet usage and help us protect their privacy by instructing them never to provide personal information without permission.

8. International Data Transfers

Your information may be transferred to and processed in countries other than your own. We ensure that such transfers comply with applicable data protection laws and that appropriate safeguards are in place to protect your information.

9. Changes to This Policy

We may update this privacy policy from time to time to reflect changes in our practices or applicable laws. We will:

  • Post the updated policy on this page
  • Update the "Last updated" date
  • Notify users of significant changes via email (if subscribed)
  • Provide a summary of key changes when material updates occur

We encourage you to review this policy periodically to stay informed about how we protect your information.

10. Contact Information

If you have questions about this privacy policy or want to exercise your rights, please contact us:

Email: privacy@sincostan.com

Contact Form: Use our contact page

Response Time: We typically respond within 24-48 hours

🔒 Our Privacy Commitment

At SinCosTan, we believe that mathematical tools should be accessible without compromising your privacy. We've designed our platform to minimize data collection while providing excellent service. Your calculations are never stored, and your privacy is always protected.

About SinCosTan

Your comprehensive resource for trigonometry and mathematical calculations. We provide free, accurate tools for students, teachers, and professionals.

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