Question #4492c
2 Answers
Use the identity
Therefore,
Explanation:
You know that
We know that when we divide by a fraction we can flip and multiply:
We cannot leave the radical in the numerator so we multiply by
That same thing with
You know that
We know that when we divide by a fraction we can flip and multiply:
Your HW is correct. Even though you don't need a unit circle, solving is easier with one. You could solve the equation with a calculator, but you need to remember to put it in radian mode.
Explanation:
So the question is:
If you look on a unit circle,
So when you put that into the original equation, you get:
Now you need to rationalize it, so you end up with: