but = 0
Hello, first time posting.
Had a quick question on a problem I was doing.
The problem:
Find exact solutions
What I've done so far is
Now, when then x is . But the answer is also
But isn't ?
I'm missing a part of the theory obviously, was just wondering if someone could clarify.
Thank you!
This division is valid only if cos x is not equal to 0!
And if sin x= 1 (or -1), then cos x= 0! Your whole method of solution is invalid.
Far better to use mr. fantastic's method, which does not depend on dividing by a function.Now, when then x is . But the answer is also
But isn't ?
I'm missing a part of the theory obviously, was just wondering if someone could clarify.
Thank you!