Select all that have a value of 0. cos 0 sin 0

For cosФ*sinФ = 0, then either cosФ or sin Ф must be zero.

cos 90 = cos 270 = 0

sin 0 = sin 180 = sin 360 = 0.

So, the values that would give you 0 are:

1. cos 90 sin Ф

2. cos 270sin Ф

3. cos Ф sin 0

4. cos Ф sin 180 and

5 cos Ф sin 360.

I just answered this question, the answers are:

cos pi/2

sin 0

tan pi