Question

can any body tell me trigo identities for class 10

Answer 1

sin A=side opposite to A/hypotenuse
cos A=side adjacent to A/hypotenuse
tan A=sin A/cos A=side opposite to A/side adjacent to A
cot A=cos A/sin A=side adjacent to A/side opposite to A
sec A=1/cos A=hypotenuse/side adjacent to A
cosec A=1/sin A=hypotenuse/side opposite to A

Answer 2

Trigonometric Identity
A trigonometric identity is an equation involving trigonometric ratios of an angle, where the equation holds true for a defined range of values of the angle.

For the right triangle ABC, let 0°≤ A ≤ 90°

1) cos2 A + sin2 A = 1.

2) cos2 A =1 - sin2 A.

3) sin2 A =1 - cos2 A.

4) sec2 A - tan2 A = 1.

5) 1 + tan2 A = sec2 A.

 6) tan2 A = sec2 A – 1.

7) cosec2 A - cot2 A = 1.

8) cot2 A + 1 = cosec2 A.

9) cot2 A = cosec2 A – 1 .

10) sec A - tan A = 1/sec A + tan A

11) cosec A - cot A = 1/cosec A + cot A