7.5 x 7.5 x (6.084−5.44)

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

What is perpendicular to y=-1/2x+11

Plz answer asap! i will reward brainliest and 12 points for these three questions!take notice: these three questions are completely different! 1) what is the percentage of sugar in the syrup made of 10 kg of water and 4 kg of suugar? 2) what was the original price if after 10% discount it became $450? 3) at first a price was decreased by 12%, then it was disounted again by an additional 5%. what is the percent of the total discount? , and remeber i will award brainliest and 12 points!