Question

521 If x = tan (A + B) + tan (A-B), y =tan(A + B) tan (A-B), then 2sin2A sin2A cos2B-cos2A (A) X= (B) x (C) y = COS2A + cos2B cos A-sin'B cos2B + cos2A cos2A -cos2B (D) y= cos2A + cos2B​

Answer 1

521 If x = tan (A + B) + tan (A-B), y =tan(A + B) tan (A-B), then 2sin2A sin2A cos2B-cos2A (A) X= (B) x (C) y = COS2A + cos2B cos A-sin'B cos2B + cos2A cos2A -cos2B (D) y= cos2A + cos2B

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