If sin(A+B)=cos(A-B) then which of the following is true1.sin2A=12.tanA=13.cos2A=14.1&2Co

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Arun · Answer

Dear Raju sinA cosB + cosA sinB = cosA cosB + sinA sinB sinA (cosB - sinB ) = cosA ( cosB - sinB) Hence SinA = cosA Hence tan A = 1 A = 45° Hence sin 2A = 1 Hence option 4 is correct because sin 2A = 1 & tan A = 1 Regards Arun (askIITians forum expert)

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If sin(A+B)=cos(A-B) then which of the following is true1.sin2A=12.tanA=13.cos2A=14.1&2Co

If sin(A+B)=cos(A-B) then which of the following is true1.sin2A=12.tanA=13.cos2A=14.1&2Co

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If sin(A+B)=cos(A-B) then which of the following is true1.sin2A=12.tanA=13.cos2A=14.1&2Co

If sin(A+B)=cos(A-B) then which of the following is true1.sin2A=12.tanA=13.cos2A=14.1&2Co

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