Question

tell me all the formulas of trigonometry class11​

Answer 1

hope it will help u and don't mark my answer

don't mark my answer

Answer 2

Answer:

Step-by-step explanation:

1. sin (-x) = -sin x

2. cos (-x) = cos x

3. tan (-x) = -tan x

4. csc (-x) = -csc x

5. sec (-x) = sec x

6. cot (-x) = -cot x

Product to Sum Formulas ....

1. sinx siny=1/2[cos(x–y)−cos(x+y)]

2.cosxcosy=1/2[cos(x–y)+cos(x+y)]

3.sinxcosy=1/2[sin(x+y)+sin(x−y)]

4.cosxsiny=1/2[sin(x+y)–sin(x−y)]

Sum to Product Formulas..

1.sinx+siny=2sin(x+y/2)cos(x−y/2)

2.sinx−siny=2cos(x+y/2)sin(x−y/2)

3.cosx+cosy=2cos(x+y/2)cos(x−y/2)

4.cosx−cosy=–2sin(x+y/2)sin(x−y/2)

hope it  hepls you..