Trigonometric identities (challenge problems) | Introduction to Trigonometry | Maths | Khan Academy

Let's learn how we can evaluate a difficult trigonometric expression using:
a. Trigonometric ratios of special angles.
b. Trigonometric ratios of complementary angles.
c. Trigonometric identities.

For more free lessons & practice - https://www.khanacademy.org/ma....th/in-in-grade-10-nc

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Created by Supriya.