Question

If cos20=5/13 findthe exact value of sin

Answer 1

12/13

Step-by-step explanation:

$\sin(20) = \sqrt{ 1 - \cos^{2} (20)} = \sqrt{1 - (\frac{5}{13}) ^{2} } = \sqrt{1 - \frac{25}{169} } = \sqrt{ \frac{144}{169} } = \frac{12}{13}$

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