Question

If sin A+B) = 1 and cut B = 1. then the value ofA=
A) 30
B) 45
C) 60
D) 90​

Answer 1

Answer:

sin A = 0°

Step-by-step explanation:

the value of sin 0° = 0.

0+1= 1.

Answer 2

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If sin(A+B) = 1 and cos(AB) = 1 .Then the value of A

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It is given that,

i) sin(A+B) = 1

⇛sin(A+B) = sin90°

⇛A+B = 90° ----(1)

ii) cos(A-B) = 1

⇛ cos(A-B) = cos0°

⇛A-B = 0° -------(2)

Add equations (1)&(2), we get

⇛ A+B+A-B=90°-0°

⇛2A = 90°

⇛ A = 90°/2

⇛A = 45°

Therefore,

⇛ (B) 45°

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