Precalculus Examples

$\sin (42) \cos (17) - \cos (42) \sin (17)$

Step 1

Evaluate $\sin (42)$ .

$0.6691306 \cos (17) - \cos (42) \sin (17)$

Step 2

Evaluate $\cos (17)$ .

$0.6691306 \cdot 0.95630475 - \cos (42) \sin (17)$

Step 3

Multiply $0.6691306$ by $0.95630475$ .

$0.63989278 - \cos (42) \sin (17)$

Step 4

Evaluate $\cos (42)$ .

$0.63989278 - 1 \cdot 0.74314482 \sin (17)$

Step 5

Multiply $- 1$ by $0.74314482$ .

$0.63989278 - 0.74314482 \sin (17)$

Step 6

Evaluate $\sin (17)$ .

$0.63989278 - 0.74314482 \cdot 0.2923717$

Step 7

Multiply $- 0.74314482$ by $0.2923717$ .

$0.63989278 - 0.21727451$

Step 8

Subtract $0.21727451$ from $0.63989278$ .

$0.42261826$