Question

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Answer 1

Answer:

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Answer 2

Answer:

cos( 90 - A) = sinA

sin( 90 - A) = cosA

tan( 90 - A) = cotA

= cos( 90 - A) x sin( 90 - A) /tan( 90 - A)

sin A x cos A / cot A

=  sin A x cos A / (cos A / sinA)

= sin A / (1/sin A)

= sin² A = RHS

HENCE PROVED.

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