Respuesta :

ANSWER

-4.0

EXPLANATION

The given trigonometric equation is

[tex] \tan \: 45 \degree - 10 \: \cos \: 60 \degree[/tex]

From special angles or using the unit circle.

[tex]\tan \: 45 \degree = 1[/tex]

[tex] \cos \: 60 \degree = \frac{1}{2} [/tex]

We make the substitution to get:

[tex]1 - 10 ( \frac{1}{2} ))[/tex]

This simplifies to:

[tex]1 - 5 = - 4[/tex]

Hence the correct answer is -4.0