Does the equation sin^2(x)-4=0 have any solutions?

i need more information

step-by-step explanation:

y=−9/2x+10

step-by-step explanation:

let's solve for y.

0−9x−2y=−20

step 1: add 9x to both sides.

−9x−2y+9x=−20+9x

−2y=9x−20

step 2: divide both sides by -2.

−2y

−2

=

9x−20

−2

y=

−9

2

x+10

answer: 180

step-by-step explanation:

12-2=10

20-2=18

10x18=180

answer: 180

step-by-step explanation:

12-2=10

20-2=18

18x10=180