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By dividing the identity sin2 θcos2 θ ≡ 1 by (a) sin2 θ (b) cos2 θ obtain two further identities Hint Recall the definitions of cosecθ, secθ, cotθ Your solution Answer (a) sin 2θ sin2 θ cos2 θ sin 2θ = 1 sin θ (b) sin θ cos 2θ cos2 θ cos θ = 1 cos2 θ 1 cot2θ ≡ cosec2θ tan2 θ 1 ≡ sec2θ Key Point 13 introduces two further important identitiesTrigonometric Identities mcTYtrigids091 In this unit we are going to look at trigonometric identities and how to use them to solve trigonometric equations In order to master the techniques explained here it is vital that you undertake plenty of practice exercises soProve the following trigonometric identities tan^2 θ sin^2θ = tan^2 θsin^2θ Example 1 Verify A Trigonometric Identity The Left Hand Side Of This Identity Is More Complicated So Transform That Expression Into The One On The Right Ppt Download Trigonometric identities tan^2