If sin(A+B) =4/5 and sin(A-B)= 3/5, then find the values of sin2A and cos2A. | Trigonometric Ratios of Compound Angles | Trigonometry | Sci-Pi

If sin(A+B) = 4/5 and sin(A-B) = 3/5, find the values of sin2A and cos2A.

 Answer:

You need to know these following things to be able to solve such questions and get the value of given compound angles.
cosec x= 1/sin x
Sec x= 1/cos x
Cot x= 1/tan x

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