If the sin 90° = 1, then which statement is true? cos 0° = 1, because the angles are complements cos 90° = 1, because the angles are supplements cos 0° = 0, because the angles are complements cos 90° = 0, because the angles are supplements

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