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21-12-2020
Mathematics

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Sin A + cos B = 1 ,A = 30 and B is an acute angle then find the value of B

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21-12-2020

Answer:

B=60°

Step-by-step explanation:

So sin(30)+cos(B)=1

1/2+Cos(B)=1

Cos(B)=1-1/2

Cos(B)=1/2

So

B=acos(1/2)

B=60

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