Question

1)how do you simplify 3xcos5x using trigometric functions
2)how do you simplify sin2xcos4x using trigometric functions

Answer 1

don't know what you mean by "simplify". They're already pretty simple.

I see no way to rewrite 3x cos5x

sin2x cos4x = (sin6x + sin2x)/2
but that doesn't look any simpler to me.

any further clarification?

Answer 2

how did you do sin2x cos4x = (sin6x + sin2x)/2 what os the formula I need to use

Answer 3

Steve help please

Answer 4

use the trig sum-to-difference formulas

sinAcosB = (sin(A+B) + sin(A-B))/2

You must have seen such. If not a visit to

http://oakroadsystems.com/twt/sumdiff.htm

bears study

Answer 5

cos3xcos5x
how do rewrie this using trigmetric finctions Steve thanks

Answer 6

come on - give it a try using the formulas. What do you come up with?

Answer 7

(cos8x+cos2x)/2 steve is it right

Answer 8

steve