Graph the unit circle using parametric equations with your calculator set to degree mode. Use a scale of 5. Trace the circle to find all values of t between 0° and 360° satisfying the following statement. (Enter your answers as a comma-separated list.)

sin t = −cos t

Question

Graph the unit circle using parametric equations with your calculator set to degree mode. Use a scale of 5. Trace the circle to find all values of t between 0° and 360° satisfying the following statement. (Enter your answers as a comma-separated list.)

sin t = −cos t

anonymous · Answer

The equations are $x(t) = \cos t$ and $y(t) = \sin t$.
As for the solutions to the equation:
$$\sin t = -\cos t \
\frac{\sin t}{\cos t} = -1 \
\tan t = -1 \
t = \frac{3\pi}{4}, \frac{7\pi}{4} $$