Trigonometry Examples

$z = 3 \cos (\frac{5 π}{18} + \sin (\frac{5 π}{18}))$

Step 1

Evaluate $\sin (\frac{5 π}{18})$ .

$z = 3 \cos (\frac{5 π}{18} + 0.76604444)$

Step 2

Add $\frac{5 π}{18}$ and $0.76604444$ .

$z = 3 \cos (1.63870906)$

Step 3

The result can be shown in multiple forms.

Exact Form:

$z = 3 \cos (1.63870906)$

Decimal Form:

$z = - 0.20358165 \dots$