Question

prove the following trigonometric identities

Answer 1

cot sqr A = cos sqr A / sin sqr A
tan sqr A = sin sqr A / cos sqr A
So,
sin sqr A*cot sqr A + cos sqr A*tan sqr A
= sin sqr A*cos sqr A/sin sqr A + cos sqr A*sin sqr A/cos sqr A
= cos sqr A + sin sqr A
= 1
Hence proved
Hope it helps
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