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Grade: 11
        
if tanx/tany=1+cos2x/1+sin2x show that sin(3x+y)=7sin(x-y).
2 years ago

Answers : (1)

Vijay Mukati
askIITians Faculty
2590 Points
							Hint: convert tanX and tanY into corresponding sin/cos form. Then apply componendo and dividendo.use the formulas of 2 sinAcosB and simplyfy it. Thanks.
						
2 years ago
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