Which of the following is not equivalent to cos pi over 5 1. cos negative pi over 5 2. cos 9pi over 5 3. cos 4 pi over 5 4. cos 11 pi over 5

The expression that is not equivalent to is:

                   3.  

We are asked to find which of the expression is not equivalent to:

1)

We know that:

Hence, we get:

Hence, option: 1 is incorrect.

2)

We know that:

As we know that:

Hence, we have:

Hence, option: 2 is incorrect.

4)

We know that:

As we know that:

Hence, we have:

Hence, option: 4 is incorrect.    

3)

We know that:

As we know that:

Hence, we have:

                Hence, option: 3 is the answer.

step-by-step explanation:

consider an orange peel: if you want to try and lay it flat, you have to stretch it, we know exactly how things are being stretched or squashed at any given point. we have many different map projections because each has different patterns of some projections can even preserve certain features of the earth without

the correct answer would be:

220 centimeters

to get this you can use the pythagorean theorem

hope this

step-by-step explanation: