How do you solve #sin(2x)=cos(x)#?
1 Answer
Apr 28, 2016
Explanation:
I cannot tell whether you have learned the double-angle formulas yet so I will develop a solution without them.
First observe that
We then have
Then we have the two possibilities defined above.
Possibility 1:
So
Possibility 2:
So
Put the two possibilities together to get the answer.