Question

For which angles 0 mmbetween 0 and 2m is cos(0)

Answer 1

Answer:
`(\pi )/(2 )` < ∅ <
`(3)/(4)\pi`

Explanation:

They are asking where is cos∅ negative. cos is your x value in the unit circle (your adjacent)

So cos∅ is neg between
`(\pi )/(2 )` < ∅ <
`(3)/(4)\pi`

theta is < but not = those values because cos ∅ is 0 (which is neither neg or pos.

Answer:
`(\pi )/(2 )` < ∅ <
`(3)/(4)\pi`