Evaluate -5cos(2.749/2)sin(2.749/2)+1/(2.749+1)

$- 5 \cos (\frac{2.749}{2}) \sin (\frac{2.749}{2}) + \frac{1}{2.749 + 1}$

Step 1

Simplify each term.

Divide $2.749$ by $2$ .

$- 5 \cos (1.3745) \sin (\frac{2.749}{2}) + \frac{1}{2.749 + 1}$

Divide $2.749$ by $2$ .

$- 5 \cos (1.3745) \sin (1.3745) + \frac{1}{2.749 + 1}$

Add $2.749$ and $1$ .

$- 5 \cos (1.3745) \sin (1.3745) + \frac{1}{3.749}$

Divide $1$ by $3.749$ .

$- 5 \cos (1.3745) \sin (1.3745) + 0.26673779$

Step 2

Add $- 5 \cos (1.3745) \sin (1.3745)$ and $0.26673779$ .

$- 0.68972496$