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Master Trigonometry for Just $3/Month

Unlock 1,000+ premium lessons, interactive calculators, audio lectures, and a completely ad-free learning experience. Everything you need to master trigonometry.

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Everything You Need to Succeed

TrigTutor.org Pro gives you unlimited access to our entire platform

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1,000+ Premium Lessons

In-depth trigonometry lessons covering everything from the basics to advanced concepts — all unlocked with Pro.

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Interactive Unit Circle Explorer

Visualize angles, radians, and trig values on the unit circle with our premium interactive tool.

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SOHCAHTOA Calculator

Master sine, cosine, and tangent relationships with our intuitive premium triangle calculator.

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Structured Microlearning Courses

Curated learning paths that break complex trig topics into digestible, step-by-step chunks.

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Audio Lectures

Learn on the go with professionally narrated audio lessons covering every topic.

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Quizzes & Practice Tests

Test your understanding with comprehensive quizzes and practice problems after every lesson.

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Completely Ad-Free

No ads, no distractions. Just pure learning. The free version shows promotions from our family of products — Pro removes them entirely.

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Privacy-First Platform

No tracking, no data selling, no third-party analytics. Your learning journey stays completely private.

Free vs Pro

See what you get with TrigTutor.org Pro membership

Feature
Free
Pro
25+ free lessons
✓
✓
Pythagorean theorem calculator
✓
✓
Full 1,000+ lesson library
—
✓
Unit Circle Explorer
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✓
SOHCAHTOA Calculator
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✓
Microlearning courses
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✓
Audio lectures
—
✓
Quizzes & practice tests
—
✓
Completely ad-free
—
✓

By the Numbers

The most comprehensive trigonometry platform on the web

1,000+
Lessons
10+
Interactive Tools
382
Topics

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Monthly
$5
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Billed monthly
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Annual
$3
per month
$36 billed annually — Save 40%
  • 1,000+ premium lessons
  • All premium calculators
  • Microlearning courses
  • Audio lectures
  • Quizzes & practice tests
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  • Cancel anytime
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Frequently Asked Questions

Can I cancel anytime?

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Yes, absolutely. You can cancel your subscription at any time from your account settings. There are no cancellation fees, and you'll retain access until the end of your billing period.

Do you accept cryptocurrency?

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Yes, we accept Bitcoin, Ethereum, and other major cryptocurrencies. Select the crypto payment option at checkout.

What about HST for Canadian users?

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We cover the HST for all Canadian customers. Everyone pays the same flat rate regardless of location. Canadian users only provide their province for tax compliance purposes — your data stays private.

Are there ads on TrigTutor.org?

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The free version of TrigTutor.org includes occasional promotions for our family of educational products — never third-party ads. Pro members get a completely ad-free experience. We never track your browsing or sell your data regardless of your plan.

What happens if I cancel?

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You'll retain full access until the end of your billing period. After that, you'll still be able to access the 25+ free lessons and free tools. If you resubscribe later, all premium content is unlocked again instantly.

Is there a student discount?

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The annual plan at $3/month is already our best pricing. We designed it to be accessible to students without requiring verification or special discounts.

Can I switch between monthly and annual?

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Yes, you can upgrade or downgrade at any time from your account settings. If you switch from monthly to annual, we'll prorate your current subscription and apply the credit.

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