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riadik2000 [5.3K]
3 years ago
7

Simplify the expression by using a double-angle formula. 2 cos^2 4 theta -1

Mathematics
1 answer:
avanturin [10]3 years ago
3 0
You are given 2cos² (4θ - 1). You are asked to s<span>implify the expression by using a double-angle formula. 

Apply the double angle of the cosine function
</span>cos2θ = 2cos² θ - 1

Rearranging the expression and then substituting them
2cos² θ = cos2θ + 1
2cos² (4θ - 1) = cos 2(4θ - 1) + 1
cos2(4θ - 1) + 1

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What is 33<img src="https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B3%7D" id="TexFormula1" title="\frac{1}{3}" alt="\frac{1}{3}" align=
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8 0
3 years ago
Helpppppppp ion know how to do this
mr_godi [17]

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Have an amazing day!

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