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