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Integrate 1 1 Cotx

We have to integrate (1)/1+cotx We know that cot x can be expressed as cos x / sin x ∫ [ 1 / ( 1 + cos x/sin x ) ] dx = ∫ [ ( sin... View Article

Prove Sin 90 A Cos A

We have to prove sin (90 - A) = cos A We know the trigonometric identity sin (A - B) = sin A.cos B - sin B.cos A Hence substituting A= 90... View Article