Spencer4254 Spencer4254

22-12-2022
Mathematics

Answered

Consider the derivation of an alternate form of the cosine double angle identity.What is the error in this derivation? in step 1, cos(2x) is equal to cos2(x) sin2(x). in step 2, sin2(x) should have been replaced with 1 cos2(x). in step 3, cos2(x) – 1 – cos2(x) should be cos2(x) – 1 cos2(x). in step 4, 2cos2(x) – 1 should be 1 – 2cos2(x).

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