SOLUTION: Express (sin 3x sin x) as a sum.

Question 1171121: Express (sin 3x sin x) as a sum.
Answer by ikleyn(52858) (Show Source): You can put this solution on YOUR website!
.


Use one of the basic Trigonometry formulas for the product of sine functions


     = .


In your case  a = 3x;  b = x;  therefore


    sin(3x)*sin(x) =  =  - ,


exactly as requested.

Solved.

RELATED QUESTIONS
Express sin(x)sin(x-y) as a difference of two... (answered by Edwin McCravy)

express as a product sin(6t) +... (answered by uma)

Please help me with this problem, express sin(3x)cos(5x) as a sum or difference of... (answered by drcole)

Solve ; sin(x) sin(2x) < sin(3x) sin(4x) (answered by MowMow,Alan3354,ikleyn)

Express sin 4theta as a function of... (answered by orca)

Prove: sin x + sin 3x + sin 5x = (sin^2 3x)/ sin... (answered by Edwin McCravy)

express the difference sin(pi/4) - sin(pi/6) as a... (answered by jim_thompson5910)

Express as a simplest form [(sin A/cos A) / (cos A/sin A)] + [(cos A/sin A)/(sin A/cos (answered by MathLover1)

Show that: sin x cos^2x - sin x =... (answered by MathLover1)