if sin theta =3/5 ( 3 upon 5) then cos theta where theta is in first quadrant
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ashishkhare687
As we know Sin square theta + cos square theta = 1 Cos square theta = 1 - sin square theta Cos square theta = 1 - (3/5)square Cos square theta = 1 - 9/25 Cos square theta = (25-9)/25 Cos square theta = 16/25 Cos theta = 4/5
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Sin square theta + cos square theta = 1
Cos square theta = 1 - sin square theta
Cos square theta = 1 - (3/5)square
Cos square theta = 1 - 9/25
Cos square theta = (25-9)/25
Cos square theta = 16/25
Cos theta = 4/5