Answer:
[tex] \frac{\pi}{4} + k\pi[/tex]
Where k is from Z
Step-by-step explanation:
We know that sin(A) = cos(A) are equal in 45° + k*180°
sin A - cos A = 0
sin A = cos A
sin A = sin ( 90 - A)
A = 90 - A
2 A = 90
A = 45°
