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tamaranim1 [39]
3 years ago
8

Can someone help me? It's urgent and thank you!

Mathematics
1 answer:
BabaBlast [244]3 years ago
7 0

Answer:

-1 and - 6

Step-by-step explanation:

Since you cannot have the denominator 0..... - 1 and - 6

make the denominator 0. Therefore they are excluded values

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The power-reducing formula, for cosine, is,

cos² θ = (1/2)[1 + cos 2θ].

In the question, we are asked to use the formulas for lowering powers to rewrite the expression in terms of the first power of cosine cos⁴ θ.

We can do it as follows:

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= (1/4)[1 + cos 2θ]²

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= 1/4 + (1/2)cos 2θ + (1/4)(1/2)[1 + cos 4θ]

= 1/4 + cos 2θ/4 + 1/8 + cos 4θ/8

= 3/8 + cos 2θ/4 + cos 4θ/8

= [ 3 + 2cos 2θ + cos 4θ]/8.

Thus, the expression cos⁴ θ in terms of the first power of cosine is <u>[ 3 + 2cos 2θ + cos 4θ]/8</u>.

Learn more about reducing trigonometric powers at

brainly.com/question/15202536

#SPJ4

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