Write sin(125°) in terms of its cofunction. Make sure your answer is a function of a positive angle.

sin(90°+35°) = cos(35°)

To write sin(125°) in terms of its cofunction, we need to determine the cofunction of sin(125°), which is the cosine of the complement of 125°.

The complement of an angle is the difference between that angle and 90°. So, the complement of 125° is 90° - 125° = -35°.

Now, we need to find the cosine of -35°. However, we can't directly use negative angles in the trigonometric functions.

To convert -35° to a positive equivalent angle, we can add 360° because the sine and cosine functions have a periodicity of 360°.

-35° + 360° = 325°

Therefore, sin(125°) can be expressed in terms of its cofunction as cos(325°).