Trigonometry Examples

$80^{2} = 12^{2} + 7^{2} - 2 (12 \cdot 7) \cos (c)$

Raise $80$ to the power of $2$ .

$6400 = 12^{2} + 7^{2} - 2 (12 \cdot 7) \cos (c)$

Simplify $12^{2} + 7^{2} - 2 (12 \cdot 7) \cos (c)$ .

Tap for more steps...

Simplify each term.

Tap for more steps...

Raise $12$ to the power of $2$ .

$6400 = 144 + 7^{2} - 2 (12 \cdot 7) \cos (c)$

Raise $7$ to the power of $2$ .

$6400 = 144 + 49 - 2 (12 \cdot 7) \cos (c)$

Multiply $12$ by $7$ .

$6400 = 144 + 49 - 2 \cdot 84 \cos (c)$

Multiply $- 2$ by $84$ .

$6400 = 144 + 49 - 168 \cos (c)$

Add $144$ and $49$ .

$6400 = 193 - 168 \cos (c)$

Graph each side of the equation. The solution is the x-value of the point of intersection.

No solution