Question

if cos is 15 by 17 find the value of cos-sin
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Answer 1

$\huge \tt \: we \: know \: that \: \:$

Cos is Reciprocal of Sin as per

$\huge \tt \sin = \frac{17}{15}$

then,

$\large \tt \: cos - sin = \frac{15}{17} - \frac{17}{15} = 0.55$