If cos x=2/3 and x is in quadrant 4 then sin x/2=

A. 1/3
B. Sqrt 1/6
C. -Sqrt 1/6
D. -1/3

Options are above will mark brainliest

B,

Step-by-step explanation:

Using half-angle identities

Using half angle identities, we know that

Plug in 2/3 for cosx

Determining sign

Since the angle x is in quadrant 4 from 270 to 360 degrees, if we divide the angle by 2, the angle x should be somewhere from 135 to 180 degrees, which would all fall in quadrant 2

all sin values in quadrant 2 are positive

Final answer

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!

answer: 12

step-by-step explanation:

because yes