# Question #ec1c9

##### 1 Answer

Lets isolate our

*divide by #2# on both sides*

So, we are looking for a number that, when multiplied by

First, the value

I like to use degrees :)

So, we need to find a number that, multiplied by

EDIT: I do believe that it is a mistake to use degrees (you can but you need to inlcude more work from the pi/180 conversion factor). Basically the answer should be in radians.

So, we're looking for a number that, when multiplied by 5, equals

So, when does

#sin(x)=-sqrt(2)/2# ?

Well, sin(x) is negative in the 3rd and 4rth Quadrants. (This is something you kinda have to memorize, though there are patterns that will help you.)

Next,

Finally,

3rd:

4rth:

so

and

we have "