Trigonometric Identities
Trigonometric Identities
Trigonometric Identities: The trigonometric identities are equalities which are true for every value appearing on both sides of the equal sign An equation involving trigonometric ratios of an angle is called a trigonometric identity, if it is true for all values of the angle(s) involved. These identities are useful whenever expressions involving trigonometric ratios are to be simplified.
Illustration: Simplify the expression:
Solution: We will simplify the expression using trigonometric Identities
=
=
Express the trigonometric ratio sin A in terms of cot A. | |||
| Right Option : A | |||
| View Explanation | |||
If | |||
| Right Option : B | |||
| View Explanation | |||
On simplifying | |||
| Right Option : C | |||
| View Explanation | |||
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