Question

What is the exact value of cos(–60º)?

Answer 1

Answer:

The exact value of $cos(-60\°)=(1/2)$

Step-by-step explanation:

we know that

The angle $-60\°$ belong to the fourth quadrant

The function cosine is positive in the first and in the fourth quadrant

so

$cos(-60\°)=cos(60\°)$

Remember that

$cos(60\°)=(1/2)$

so

$cos(-60\°)=(1/2)$

Answer 2

The exact value is. +1/2.