Determine all the values of for which sin() = cos(), for the domain
-360°

Question

Determine all the values of  for which sin() = cos(), for the domain 
-360° <  < 360°

anonymous · Answer

Determine all the values of theta for which sin(theta) = cos(theta), for the domain 
-360° <  < 360°

anonymous · Answer

Sorry, that was a wrong answer.
It should be -315deg, -135deg, 45deg, 225deg. Try checking on the calculator.

anonymous · Answer

This question was part of a lesson, I just don't know how the teacher got this answer.

anonymous · Answer

Yes, you're rigth. Can you explain it how you got it?

anonymous · Answer

You know that each of the value for cosine and sine are different in each quadrant, right?

anonymous · Answer

Yes, o, 180 and 360 for sine. 90 and 270 for cos.

anonymous · Answer

No no. I mean this.|dw:1346653204022:dw|
where these symbols represent positivity of the trigonometrical ratio in that quadrant.
A is all, S is sine, T is tangent and C is cosine.
If you're to refer to the attachment you posted here, just take note of the intercepts of both the graphs. That will be where the values of sin theta = cos theta

anonymous · Answer

OKay, can you provide me with one example on how to get the first value.