Example

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

Question

$$\tan 30 \times \tan 60+ \sin 30 \times \cos 60$$

Answer

-1.108951

Solution


Calculate.
\[-1.108951\]
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