How do you solve 2sin(5x+4)=-sqrt(3)2sin(5x+4)=3?

1 Answer
Feb 3, 2015

Step by step.

Step 1:
Divide both sides by 22 to get sinsin without a nummber
2sin(5x+4)=-root 2 3->sin(5x-4)=-1/2 root 2 32sin(5x+4)=23sin(5x4)=1223

Step 2:
Take the arcsinarcsin of the expression at the right
(arcsinarcsin on your calculator will often look like sin^-1sin1
and you use it with the Shift or 2nd button)

(5x-4)=arcsin(-1/2 root 2 3)=?(5x4)=arcsin(1223)=?

The question mark is because it is not clear whether you use degrees or radians. In both cases a number will come out.

Step 3:
Solve for xx
5x-4="number"->x=("number"+4)/55x4=numberx=number+45