Question

sinA+Cos B
=1, A=30°, and B is an acute angle, then find the value of
​

Answer 1

Step-by-step explanation:

sin30°= 1/2

1/2 + cos B= 1

{1+2(cos B)}/2=1

1+2(cos B)=2

2(cos B) =1 ( because transpose 1 to R.H.S)

now transpose 2 to R.H.S,

cos B = 1/2

therefore, cos B= cos 60°

cancelling cos from both sides,

therefore, B = 60°

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Answer 2

Answer:

Step-by-step explanation:

1/2+cos B=1

Cos B=1-1/2

Cos B=1/2

=60 degree