ICSE Class 9 Answered
If 2sin (A+B)-1=0 and 2sin (A-B)-
3=0
Find A and B
Asked by abhiraj.abhinav39 | 31 May, 2019, 05:23: PM
Expert Answer
2 sin (A + B) - 1 = 0 and 2 sin (A - B) - √3 = 0
2sin(A + B) = 1 and 2sin (A - B) = √3
sin (A + B) = 1/2 and sin (A - B) = √3/2
A + B = 30° and A - B = 60°
Solving both equations simultaneously we get A = 45° and B = -15°
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