Find the exact value of $\sin^2\left(20^\circ\right)+\cos^2\left(20^\circ\right)$sin2(20°)+cos2(20°).

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?

Which of the following options correctly completes the identity?

$\tan^2\left(x\right)+1=\editable{}$tan2(x)+1=

$1=\editable{}$1=

Manipulate trigonometric expressions

Apply trigonometric methods in solving problems