### Home > A2C > Chapter Ch12 > Lesson 12.3.1 > Problem 12-125

12-125.

Give the exact value(s) for each of the unknowns (0

*≤**θ*< 2*π*) in the equations below. Homework Help ✎= ? =? tan

*θ*= 1tan(

*θ*) = −1

Use the unit circle.

See part (a).

Where on the unit circle does sinθ = cosθ?

See part (c).