Question
Asked Oct 25, 2019
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Write the given expression as an algebraic expression in x

cos(2 tan−1(x))

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Expert Answer

Step 1

Given:

cos(2tan(x))
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cos(2tan(x))

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Step 2

Identity used:

sin2 x cos
cos 2x 2 cos2 x-1
--12]
sinx
3]
tan x
cos.x
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sin2 x cos cos 2x 2 cos2 x-1 --12] sinx 3] tan x cos.x

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Step 3

Solve for &lsquo...

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Tagged in

Math

Trigonometry

Trigonometric Ratios