Question

the most common formulas in trigonometry

Answer 1

the most common formulas are the three basic trigonometric identities.....

(1) :- sin^2x + cos^x = 1

(2) :- 1 + tan^2x = sec^2x

(3) :- 1 + cot^2x = cosec^2x

Answer 2

1)sin theta =1/cosec theta
2)cos theta=1/sec theta
3)tan theta=1/cot theta
4)cot theta=1/tan theta
5)sec theta=1/cos theta
6)cosec theya=1/sin theta
7)tan theta=sin theta/cos theta
8)cot theta=cos theta/sin theta...
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