At what degree measure in the first quadrant are the sine and cosine of the angle equal?
Show answer
45 degrees
At 45 degrees (or pi/4 radians), the opposite and adjacent sides of a right triangle are equal. This results in both sine and cosine being equal to 1/sqrt(2), or approximately 0.707.
Also asked as:
- In the first quadrant, at what angle in degrees do the sine and cosine functions yield the same value?