Analytic Trig
cos(2x-π/4)=0
Find all solutions of the equation that are in the interval [0,2π]
Can someone help me to answer this question please? D: I don't exactly know where to begin on this! :( Please and thank you!

Question

Analytic Trig
cos(2x-π/4)=0
Find all solutions of the equation that are in the interval [0,2π]
Can someone help me to answer this question please? D: I don't exactly know where to begin on this! :( Please and thank you!

kfujioka · Answer

When is cos(a)=0 ?  Recall the unit circle.

anonymous · Answer

Yes I know I need the unit circle. I just don't know how to solve the equation

kfujioka · Answer

in order for cos(2x-pi/4)=0, then 2x-pi/4 = ??

anonymous · Answer

it must equal cos???

kfujioka · Answer

If I said, cos(a) = 0, what values of a would make that statement correct?