Prove that 1/1+sinA -1/1+sinA =2tanAsinA

Can someone me i’m confused. will give brainliest and a whole bunch of points

Select all the expressions that will include a remainder.

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?