Algebra Examples

$\cos (175) \cdot \cos (55) + \sin (175) \cdot \sin (55)$

Step 1

Multiply $\sin (175)$ by $\sin (55)$ .

$\cos (175) \cos (55) + \sin (175) \sin (55)$

Step 2

The result can be shown in multiple forms.

Exact Form:

$\cos (175) \cos (55) + \sin (175) \sin (55)$

Decimal Form:

$- 0.5$