could you help me please... √3.cosX – sinX = √3
There's a simpler way.
When you don't know where to start, when given , find the modulus, that is and factor it out.
You would then have
they're both in and are such that
Thus there exists such that and
Here, you can find that
So you can divide by 2 on both sides :
Note that and
So your equation is now
Then remember that