Question

Show that
(sin3A/sinA)+(cos3A/cosA)=4cos2A​

Answer 1

Answer:

sin3A / sinA + cos3A / cosA = 4cos2A Please to do this using as least steps as possible please?\ Thanks!! Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website! A=acute angle sin3A / sinA + cos3A / cosA = 4cos2A I assume you meant to write given expression as follows: 4cos^2(A)=1 cos^2(A)=1/4 cos(A)=1/2 A=60º or π/3

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