Question

If sin=3/5 then what cos equal to

Answer 1

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Answer 2

`\sin {}^(2) ( \alpha ) + \cos {}^(2) ( \alpha ) = 1`

`(9)/(25) + \cos {}^(2) ( \alpha ) = 1`

`\cos {}^(2) ( \alpha ) = (16)/(25)`

`\cos( \alpha ) = (4)/(5)`