First of all, we can use the double angle identity to write
The equation becomes
Divide both sides by 3 to get
And finally consider the square root of both terms (don't forget the double sign):
So, the solutions are
If you want x in [0,360], consider the equivalent angle
Answer:
(3,-1)
Hope this helps! :)
I'm pretty sure the answer is D
Shown above
Step-by-step explanation:
Sorry for my untidy handwriting