Episode 22 — Trigonometry

Evaluating Trigonometric Ratios on a Calculator

Learners will be able to:

• Evaluate trigonometric ratios on a calculator using the equals key. • Round answers to three decimal places when evaluating trigonometric ratios on a calculator. • Press the fraction key and insert an expression into a calculator to evaluate fractions of trigonometric ratios. • Understand that squaring a trigonometric ratio means squaring the entire ratio, not just the angle itself. • Input sin squared of an angle in brackets using a calculator.