Interactive practice questions
Find the exact value of $\sin^2\left(20^\circ\right)+\cos^2\left(20^\circ\right)$sin2(20°)+cos2(20°).
Easy
1min
Consider the statement: $\sin^2\left(\theta\right)+\cos^2\left(\theta\right)=2$sin2(θ)+cos2(θ)=2
Is the statement possible or impossible?
Easy
< 1min
Which of the following options correctly completes the identity?
$\tan^2\left(x\right)+1=\editable{}$tan2(x)+1=
Easy
< 1min
Which of the following options correctly completes the identity?
$1=\editable{}$1=
Easy
< 1min
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