Question

Rewrite with only sin x and cos x

sin 3x - cos x

HELP!

Answer 1

elaborate it

Answer 2

2 sin x - sin^3 x - cos x

2 sin x cos^2 x + sin x - 2 sin^3 x - cos x

2 sin^3 x cos^4 x + 1

3 sin x cos x - sin^3 x - cos x

HERES THE ANSWER CHOICES (((((((:

Answer 3

@Muhammad_Nauman_Umair

Answer 4

@Zarkon help me please!

Answer 5

or @saifoo.khan (:

Answer 6

sin(2x) = 2sinxcosx
Now im stuck on how to use this for the left term in your problem.

Answer 7

me too :(

Answer 8

either it is b or d option

Answer 9

it was b thanks though

Answer 10

sin(3x) = sin(2x+x) = sin(2x) + sin(x)

Answer 11

sin(a+b) = sinacosb +cosasinb

Answer 12

^

Answer 13

option b is true

Answer 14

As
=Sin(2x+x)-Cosx
=Sin2xCosx+Cos2xSinx-Cosx
=(2 SinxCosx)Cosx+(1-2 Sin^2x)Sinx-Cosx
=2SinxCos^2x+Sinx-2Sin^3x-Cosx

Answer 15

I got the answer guys don't worry! but thanks a ton(: