Please help and please show work!

I have the answers already, want to double check to make sure its right. Please show work!

Question 3 Prove the following identities: a) b) 1 + tan 0 sec O 2 tan x - = sin 2x 1 + cot 0 csc 0 1 + tan x Question 4 Convert the following to either rectangular or polar equations: a) r = -3sin 0 b) x - 4y =4 Question 6 Convert the following to polar coordinates using radians: a) b) (-3, 31/3) (-4, 4 ) Convert the following to rectangular coordinates: a) b) 3 7t 7 , 6 4