Question

If tan theta is equal to a by b prove that a sin theta minus b cos theta by a sin theta + b cos theta is equal to a square minus b square by a square + b square

Answer 1

Q. -If tan theta is equal to a by b prove that a sin theta minus b cos theta by a sin theta + b cos theta is equal to a square minus b square by a square + b square

Ans. - see the image..