Question

if cos (90-A)
=0 then sin ( A+B ) =​

Answer 1

Answer:

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Answer 2

Answer:

cos(90-A) = 0

=> cos(90-A) = cos90

=> 90-A = 90

=> A = 0

therefore, sin(A+B) = sin(0+B)

=> sin(A+B) = sinB