Please help me with this answer

Step-by-step explanation:

sin^2x=1/2

so sinx=1/V2=V2/2

x=pi/4

Step-by-step explanation:

Divide both sides by 2:

Take the square root of both sides:

The only two places on the unit circle where the y value of the point is are at:

Hope this helps!

i think asking google will you get the answer to that question

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional