B) x cot (90° + A) + tan (90° + A) sin A + cosec (90° + A) =0 solve it please do it i need it now

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

Піf x = y and y= z, which statement must be true? оа. -x = -2 b. x= z ос. —x = 2 od. 2= x