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Sin ( 90 + theta ) = cos theta prove^
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4 votes
Sin ( 90 + theta ) = cos theta

prove^

User Kingofzeal
by
8.1k points

1 Answer

1 vote
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.
User Ranjeet Ranjan
by
8.8k points
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