Precalculus Examples

$\sin (20) \cos (10) + \cos (20) \sin (10)$

Step 1

Simplify each term.

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Step 1.1

Evaluate $\sin (20)$ .

$0.34202014 \cos (10) + \cos (20) \sin (10)$

Step 1.2

Evaluate $\cos (10)$ .

$0.34202014 \cdot 0.98480775 + \cos (20) \sin (10)$

Step 1.3

Multiply $0.34202014$ by $0.98480775$ .

$0.33682408 + \cos (20) \sin (10)$

Step 1.4

Evaluate $\cos (20)$ .

$0.33682408 + 0.93969262 \sin (10)$

Step 1.5

Evaluate $\sin (10)$ .

$0.33682408 + 0.93969262 \cdot 0.17364817$

Step 1.6

Multiply $0.93969262$ by $0.17364817$ .

$0.33682408 + 0.16317591$

Step 2

Add $0.33682408$ and $0.16317591$ .

$0.5$