Find the Exact Value sin(2arctan(-3/4))

$\sin (2 \arctan (- \frac{3}{4}))$

Evaluate $\arctan (- \frac{3}{4})$ .

$\sin (2 \cdot - 0.6435011)$

Multiply $2$ by $- 0.6435011$ .

$\sin (- 1.28700221)$

The result can be shown in multiple forms.

Exact Form:

$\sin (2 \arctan (- \frac{3}{4}))$

Decimal Form:

$- 0.96$