Answer:
The exact value of [tex]cos(-60\°)=(1/2)[/tex]
Step-by-step explanation:
we know that
The angle [tex]-60\°[/tex] belong to the fourth quadrant
The function cosine is positive in the first and in the fourth quadrant
so
[tex]cos(-60\°)=cos(60\°)[/tex]
Remember that
[tex]cos(60\°)=(1/2)[/tex]
so
[tex]cos(-60\°)=(1/2)[/tex]
