Question

if cos (A+B)=0 and sin (A-B) = 1/2 then find A and B
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Answer 1

Answer:

1) cos (A+B)= 0

⇒cos(A+B) =cos 90°

A+B = 90----(1)

2)sin (A-B)= 1/2

sin(A-B) =sin 30°

A-B=30----(2)

add (1) and(2)

2A=120

A =120/2

A=60

substitute A= 60 in (1)

you can get B= 30

therefore

A= 60 and B=30

Answer 2

Answer:

a=60 b=30 is the. answer

Step-by-step explanation:

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