Question

(iii) (sin 3x +sin x)sin x + (cos 3x - cos x)cos x = 0​

Answer 1

Answer:

Step-by-step explanation:

Subscibe to Pewdiepie

Answer 2

Answer:

HEY MATE HETE IS YOIR ANSWER

Step-by-step explanation:

Answer:

See below:

Explanation:

(sin3x+sinx)sinx+(cos3x−cosx)cosx

=sin3xsinx+sin2x+cos3xcosx−cos2x

=sin3xsinx+cos3xcosx−(cos2x−sin2x

=cos2x−cos2x

0, as required

HOPE IT HELPS

MARK AS BRAINLIEST.