Question

Express cos 71° - sin 57° + tan 63° in terms of trigonometric ratios of angles between 0° and 45°

Answer 1

hi friend!
Given cos 71° - sin 57° + tan 63°

⇒ Cos ( 90° - 19° ) - Sin ( 90° - 33° ) + Tan ( 90° - 27° )

⇒ Sin 19° - Cos 33° + Cot 27°

check this one please

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Answer 2

Answer:

HELLO

cos 71° - sin 57° + tan 63°

= cos (90° - 19°) -sin(90° - 33°) + tan (90° - 27)  

= sin 19° - cos 30° + cot 27°

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