Interactive practice questions
Let $\theta$θ be an acute angle (in degrees).
If $\sin\theta=0.9$sinθ=0.9, find the value of:
a
$\sin\left(180^\circ-\theta\right)$sin(180°−θ)
b
$\sin\left(180^\circ+\theta\right)$sin(180°+θ)
c
$\sin\left(360^\circ-\theta\right)$sin(360°−θ)
d
$\sin\left(-\theta\right)$sin(−θ)
Easy
2min
Let $\theta$θ be an acute angle (in degrees).
If $\cos\theta=0.1$cosθ=0.1, find the value of:
Easy
1min
Let $\theta$θ be an acute angle (in degrees).
If $\tan\theta=0.23$tanθ=0.23, find the value of:
Easy
1min
If $\sin x=\sin30^\circ$sinx=sin30° and $90^\circ
Easy
< 1min
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