Sin ( 90 + theta ) = cos theta prove^

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asked Feb 2, 2017 146k views

1 Answer

Ranjeet Ranjan · Answer 1 · 2017-02-06T08:34:14+0000

We will use additional formula:
sin ( 90°+ theta ) = sin 90° * cos(theta) + cos 90° * sin(theta)=
= 1 * cos(theta) + 0 * sin(theta)= cos (theta) It is proved.

Sin ( 90 + theta ) = cos theta prove^

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