Question

Evaluate 15cos60°. evaluate.

Answer 1

15/2 or 7.5

Explanation:

cos(60)=1/2

so 15(1/2)=15/2 or 7.5

Answer 2

For this case we must evaluate the following expression:

`15 * cos (60)`

By definition we have that the cosine of 60 degrees is
`\frac {1} {2}.` Then, substituting in the expression we have:

`15 * \frac {1} {2} = \frac {15} {2} = 7.5`

So, we have:

`15 * cos (60) = 7.5`

Answer:

`15 * cos (60) = 7.5`