What is 2cos(x)(-sin(x)) ?

The solution to 2cos(x)(-sin(x)) is -sin(2x)

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simplify 2cos(x)(-sin(x))

simplify

2 cos (x) (- sin (x))

- sin (2 x)

Solution steps

2 cos (x) (- sin (x))

Apply rule:

a (- b) = - ab

2 cos (x) (- sin (x)) = - 2 cos (x) sin (x)

= - 2 cos (x) sin (x)

Use the Double Angle identity:

2 sin (x) cos (x) = sin (2 x)

= - sin (2 x)

7 (2 x - 2) - 6 (x + 11)

(\frac{8}{9} + \frac{5}{6} m) - 2 m

\frac{( 8.98 - 8.976 )}{8.98}

4 (- 8 x + 5) - (- 33 x - 26)

\frac{sec ( θ )}{csc ( θ )}