Question

in sin = 11/61 then find value of cos using identify ​

Answer 1

${sin}^{2} + {cos}^{2} = 1 \\ {cos}^{2} = 1 - \frac{121}{3721} \\ {cos}^{2} = \frac{3600}{3721} \\ cos = \frac{60}{61}$

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