Question

and cos (A + 4B) = 0, where A and B
Find A and B if sin (A + 2B) =
are acute angles.
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Answer 1

Step-by-step explanation:

sin(A+2B)=60°

cos(A+4B)=90°

A+2B=60°......(1)

A+4B=90......(2)

subtracting(2) from (1)

A+4B-A-2B=90°-60°

2B=30°

B=15°

and

A+4B=90°

A+4(15°)=90°

A+60°=90°

A=90°-60°

A=30°

I hope its helpful for uand slct to brillent ans