Question

If sin theta = a/b then what is cos theta equal to

Answer 1

Given sin Ø = a/b
Then cos Ø = ?
We know that
sin^2 Ø + cos^2 Ø = 1
(a/b)^2 + cos^2 Ø = 1
cos^2 Ø = 1 - (a/b)^2
cos Ø = [ 1 - (a/b)^2 ] ^ 1/2

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