# Question - Trigonometric Identities - Proof and Applications of the Identity

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ConceptTrigonometric Identities - Proof and Applications of the Identity

#### Question

Prove the following identities:

(i) (sinθ + cosecθ)^2 + (cosθ + secθ)^2 = 7 + tan^2 θ + cot^2 θ

(ii) (sinθ + secθ)^2 + (cosθ + cosecθ)^2 = (1 + secθ cosecθ)^2

(iii) sec^4 θ– sec^2 θ = tan^4 θ + tan^2 θ

#### Solution

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