I did this problem and I was told I did it wrong how do I fix it??

Mathematics

1 answer:

Ksivusya [100]3 years ago

5 0

Answer:

(1/8)(cos(4x) -4cos(2x) +3)

Step-by-step explanation:

Your answer is correct as far as it goes. You now need to use a power-reducing identity on the cos(2x)² term in your answer. The appropriate one is ...

cos(x)² = (1/2)(1 +cos(2x))

In the context of this problem, using this formula gives you ...

sin(x)⁴ = (1/4)(1 -2cos(2x) +(1/2)(1 +cos(4x))

sin(x)⁴ = (1/8)(cos(4x) -4cos(2x) +3)

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