10 Further trigonometry
Interactive practice questions
Consider the expression $\sin135^\circ$sin135°.
a
In which quadrant is $135^\circ$135°?
First quadrant
A
Second quadrant
B
Third quadrant
C
Fourth quadrant
D
b
What positive acute angle is $135^\circ$135° related to?
c
Is $\sin135^\circ$sin135° positive or negative?
negative
A
positive
B
d
Rewrite $\sin135^\circ$sin135° in terms of its relative acute angle. You do not need to evaluate $\sin135^\circ$sin135°.
Easy
1min
Consider the expression $\tan120^\circ$tan120°.
Easy
1min
Consider the expression $\cos240^\circ$cos240°.
Easy
1min
State whether each of the following are equal to $\cos\theta$cosθ or not.
Medium
1min
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