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N6ydiaschicalopergu
N6ydiaschicalopergu N6ydiaschicalopergu
  • 14-06-2016
  • Mathematics
Answered

verify the identity of


sin (x+pi/2)=cos x

Verified Answer :

nobillionaireNobley
nobillionaireNobley nobillionaireNobley
  • 15-06-2016

Sin(A+B) = sinAcosB + sinBcosA
sin (x + pi/2) = sin x cos pi/2 + sin pi/2 cos x
= sin x (0) + 1 (cos x)
= cos x
(cos pi/2 = 0 and sin pi/2 = 1)

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