Suppose that tana= and
12
2
Find the exact values of sin
2
a
and tan
2

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Equation for the calculation double 2 and then add 5

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)