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ok then what?

thats the answer

You should explain a little...

naaaaah

I like toast

Try to factor: you can factor out cos x

cos x(1+2sin x)=0

quit trippin . . .

ZeHanz = Afganistan PIMP

So cos x = 0 or 1+2sin x = 0

ok

don't lie . . .

dry your eye

cos x = 0 or sin x = -½
Now try to remember what values of x will give cos x = 0 or sin x = -½...

The pimp was strong, the bit*h was gone, something was wrong I said what is going on?

yo

how would I do that do you have a link?

You could use this one, see image

cos x = 0 gives pi/2 and 3pi/2
sin x = -½ gives 7pi/6 and 11pi/6

so it's B

Yup!