Consider the expression $\sin135^\circ$sin135°.
In which quadrant is $135^\circ$135°?
fourth quadrant
first quadrant
third quadrant
second quadrant
What positive acute angle is $135^\circ$135° related to?
Is $\sin135^\circ$sin135° positive or negative?
positive
negative
Rewrite $\sin135^\circ$sin135° in terms of its reference angle. You do not need to evaluate $\sin135^\circ$sin135°.
Consider the expression $\cos240^\circ$cos240°.
Consider the expression $\tan210^\circ$tan210°.
Consider the expression $\sin\frac{7\pi}{6}$sin7π6.