1. Properties: Trigonometric Identities
A trigonometric identity is a trigonometric equation that is true for all values except those for which the expressions on either side of the equal sign are undefined.
Properties: Trigonometric Identities
Reciprocal Identities
Tangent & Cotangent Identities
Pythagorean Identities

2. Ex 1: Verify the Pythagorean identity
1 + tan2 θ = sec2 θ

3. (sin x + cos x)2 = 1 + 2(sin x)(cosx)
Ex 2: Verify the identity
(sin x + cos x)2 = 1 + 2(sin x)(cosx)

4. Ex3: Simplify
cscθtanθ

6. Attachments