Question

2cos2x=1 find x it is a trigonometric question ppz help fast ​

Answer 1

Answer:

2cos2x=1

cos2x =1/2=cos π/3

2x=π/3

x=π/6

Answer 2

Answer:

Step-by-step explanation:

2Cos2x=1

Or, Cos2x=(1/2)

Or,1-2Sin^2x=1/2

Or, -2Sin^2x= -1/2

Or, Sin^2x=1/4

Or, Sinx=√(1/4)

Or, Sinx=+1/2 &-1/2

Or, x= Sin inverse{+-(1/2)}

Or, x=30°,120° ( for positive 1/2)

And x=210°,330°( for Sinx=-1/2)