Question

prove that cos2 theta(1+tan2theta)+sin2 theta ( 1+cot2 theta)

Answer 1

WHT we have to prove pls tell Tht

Answer 2

Solution :

I am using A instead of theta.

cos²A( 1 + tan²A ) + sin²A( 1 + cot²A )

= cos²Asec²A+sin²Acosec²A

= 1 + 1

[ We know , cosA= 1/secA, cotA = 1/sinA ]

= 2

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