Question

Which of the following are solutions to the equation sinx cosx =-1/4? Check all that apply.
A.7pi/12+npi
B.11pi/12+npi
C.7pi/12+npi/2
D.7pi/6+npi

Answer 1

what is n?

Answer 2

I'm not sure, just part of the problem

Answer 3

Ok got it... wait.

Answer 4

use sin(2x)=2sin(x)cos(x)
this is the double angle identity
divide 2 on both sides you have
1/2*sin(2x)=sin(x)cos(x)
replace sin(x)cos(x) with 1/2*sin(2x)

Answer 5

I agree with @freckles
You will get x=pi/12
Then you can solve for n.
Did you get it?
Or you need more help

Answer 6

I got it. The answer was A and B

Answer 7

Congrats @melisa1m