Question

Based on the given triangle, the cosine of the 60 degree angle is:

Answer 1

The cosine of a 60 degree angle is 1/2. 

Answer 2

Hence, the value of cosine of the 60 degree angle is:
`(1)/(2)`.

Explanation:

We are asked to find the value of cosine of the 60 degree angle of the triangle.

We know that the cosine function is one of the basic functions encountered in trigonometry."the cosine of an angle in a right‐angle triangle is the ratio of the length of the adjacent leg to the length of the hypotenuse."

Now we know directly that the
`\cos 60 \degree=(1)/(2)`

and this value is also equal to
`\sin 30\degree`

since, we know that
`\cos (90-x)=\sin x`

Hence, the value of cosine of the 60 degree angle is:
`(1)/(2)`.