anonymous
  • anonymous
Verify the identity. sin { x+ (pi/2) = cos x
Mathematics
chestercat
  • chestercat
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welshfella
  • welshfella
using the compound angle formula sin ( x + pi/2) = sin x cos pi/2 + cos x sin pi/2 cos pi/2 = 0 and sin pi/2 = 1
welshfella
  • welshfella
so plug in these values and you'll get the required result

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