Question

Verify the following identity: sin(3x)-sin(x)=2cos(2x)sin(x)?

Answer 1

i think you can use the factor formulae here
sin 3x - sin x = 2 cos (3x +x)/2 * sin (3x-x)/2
= 2cos (2x)sin x

the formula is sin a - sin b = 2 cos semi sum * sin semi difference

Answer 2

help meeeeee

Answer 3

i posted it

Answer 4

sorry aravindG i have to go out urgently

Answer 5

:(( plzzz

Answer 6

last one

Answer 7

someone else will have to im afraid