Question

Rewrite each trig expression in a simpler form using trig identities.
a. 2sin5pcos5p
b. sin(pi/6)cos(pi/4)-cos(pi/6)sin(pi/4).

Answer 1

a. 2sin5pcos5p --- Try the double angle formula for sine on this one.

Answer 2

sin(pi/6)cos(pi/4)-cos(pi/6)sin(pi/4)

Apply the difference formula for sine on this one.

http://home.windstream.net/okrebs/page101.html

Answer 3

Thanks, but I don't know how to apply these formulas to these problems

Answer 4

The person I was helping left me so let's see about this.

Answer 5

What is the double angle formula for sine?

Answer 6

sin (2x) = 2* sin x * cos x

= 2* sin 5p * cos 5p

In your problem, x = 5p

Answer 7

So, sine of what angle will equal the expression you were given?

@mkapad01

Answer 8

If you don't respond, I cannot continue to help.

Answer 9

sorry, I had to leave

Answer 10

We were looking at sine of 2x.

Answer 11

sin (2x) = 2* sin x * cos x
= 2* sin 5p * cos 5p

So, sin( 2 * 5p) = 2* sin 5p * cos 5p


What is 2 * 5p ?

Answer 12

I'm not sure