Finding exact Trig Values
More Lessons for GCSE Maths
Videos to help GCSE Maths students learn how to find the exact trigonometric values.
How to find the exact trigonometric values: sin, cos, tan?
1. Draw the angle, look for the reference angle.
2. Use special triangles or the unit circle.
3. Check the quadrant to determine the sign (+ or -).
Trigonometry - Solving exact values of sin, cos, tan
Calculating exact values of sin, cos, tan without a calculator
Find exact trig values with CAST rule
This video explains how to use the trig special triangles and CAST rule to determine the ratios associated with various angles.
Find Exact Values of Trig Functions
How to use the unit circle to find exact values of trigonometric functions
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