Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$${ \sin }^{ 2 } 30$$

Evaluate

$\left(\sin(30)\right)^{2}\approx 0.97620649$

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