The answer must be written as a multiple of π. Give exact answers. Do not use decimal numbers. The answer must be an integer or a fraction. Note that π is already provided with the answer so you just have to find the appropriate multiple. E. g. if the answer is π2 you should enter 1/2. If there is more than one answer write them separated by commas.

2(sinx)2−5cosx+1=0

x= []π