(cosec theta - sin theta) (sec theta - cos theta) = sin theta . cos theta
If A, B and C are interior angles of a triangle ABC
Express the trigonometric ratios sin A, tan A and sec A in terms of cot A
Prove the trigonometric identity
Express each of the following in terms of trignometric ratio of angles
2 sin A cos A + (cos A + sin A) square - (2 cos A + sin A) square
If cos theta - sin theta = underoot 2 sin theta, prove that cos theta + sin theta
From the following figure, find
tan square theta + cot square theta + 2
tan theta - cot theta = 2 sin square theta - 1/sin theta cos theta
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