The expression equivalent to sin 3x−sin x is what

The required equivalent form of given expression is

Step-by-step explanation:

Given : Expression

To find : The expression is equivalent to ?

Solution :

Applying trigonometric formula,

where, a=3x and b=x

Therefore, The required equivalent form of given expression is

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5