Trigonometry Examples

$\cos (\frac{37 π}{42}) \cos (\frac{5 π}{7}) + \sin (\frac{37 π}{42}) \sin (\frac{5 π}{7})$

Step 1

The result can be shown in multiple forms.

Exact Form:

$\cos (\frac{37 π}{42}) \cos (\frac{5 π}{7}) + \sin (\frac{37 π}{42}) \sin (\frac{5 π}{7})$

Decimal Form:

$0.86602540 \dots$