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Question

Evaluate cotθtan(90oθ)sec(90oθ)cosecθ+sin225o+sin265o+3tan6otan16otan74otan84o.

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Solution

cotθ.tan(90θ)sec(90θ).cscθ+sin225+sin265+3tan6tan16tan74tan84
=1+1+(×1)
=3

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