Math, asked by Debasish5280, 1 year ago

Trigonometric functions class 11 formulas

Answers

Answered by sanjay270899
4
There are many formulas for trigonometry for class 11 around 50 , I am writing some of them here,

1.) sin(a+b) = Sina cosb + sin cosa
2.) sin(a-b) = Sina cosb - sin cosa
3.) cos(a+b) = cosa cosb - Sina sinb
4.) cos(a-b) = cosa cosb + Sina sinb
5.) tan(a+b) = { tana + tanb } / 1- tana tanb
6.) sin2a = 2 Sina cosa
7.) cos2a =cos^2a-sin^2a =1 -2sin^a=2cos^2a-1
8.) Sina + sinb = 2 sin{(a+b)/2} cos{(a-b)/2}
9.) Sina - sinb = 2 cos{(a+b)/2} sin{(a-b)/2}
10.) seca - tanb = 1 / (seca + tanb )

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