Let (x) = sin 2 x and g(x) = cos 2 x. (a) Use an identity and
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Let ƒ(x) = sin2 x and g(x) = cos2 x.
(a) Use an identity and prove ƒ'(x) = −g'(x) without directly computing ƒ'(x) and g'(x).
(b) Now verify the result in (a) by directly computing ƒ'(x) and g'(x).
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a Using the identity sin 2 x cos 2 x 1 we have x gx 1 Taking the ...View the full answer
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