Solve for cos(theta) in sin^2(theta) + cos^2(theta) = 1.

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12-02-2018
Mathematics

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Solve for cos(theta) in sin^2(theta) + cos^2(theta) = 1.

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sqdancefan sqdancefan · Answer 1 · 2018-02-12T21:25:21+01:00

sqdancefan sqdancefan

12-02-2018

Subtract the sine term and take the square root.
[tex] cos(\theta)^{2} = 1 - sin(\theta)^{2} [/tex]
[tex] cos(\theta) = \pm \sqrt{1 - sin(\theta)^{2}} [/tex]

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