Question

5 sin (-90°) - 2 cos (-60°)

Answer 1

Відповідь:     - 6 .  

Пояснення:

    5sin (-90°) - 2cos (-60°) = - 5sin90° - 2cos60° = - 5 * 1 - 2 * 1/2 =

  = - 5 - 1 = - 6 .    

Answer 2

To evaluate the expression 5 sin(-90°) - 2 cos(-60°), we can use the trigonometric identities and properties.

First, let's consider the values of sine and cosine for the given angles:

sin(-90°) = -1 cos(-60°) = 1/2

Now we can substitute these values into the expression:

5 sin(-90°) - 2 cos(-60°) = 5(-1) - 2(1/2) = -5 - 1 = -6

Therefore, the value of the expression 5 sin(-90°) - 2 cos(-60°) is -6.