Question
Asked Dec 6, 2019
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Verify the identity. (Simplify at each step.)

5 sinx − 5 sin4 x = 5 cos2 x − 5 cos4 x
 
5 sinx − 5 sin4 x = 5 sin2 x (1 - _____ )
                               = (5 - 5 cos2 x) (cos2 x)
                               = 5 cosx − 5 cos4 x
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Expert Answer

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Step 1

Given identity is,

5 sin2 x − 5 sin4 x = 5 cos2 x − 5 cos4 x

Consider,

5 sin2 x − 5 sin4 x

Take out 5 sin2 x in common and we get

 = 5 sin2&nb...

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