Please answer ques 10 quickly I need very urgent

Please answer ques 10 quickly I need very urgent 2. 6. 9. Differentiate sin¯ . prove that 3-21 a • then show that I — cos 2x If — — log , prove that 1 eos 2x - 2 Cosec 2N If xy log IN I, prove that prove that Find . if Differentiate ax (x ± 2)5'7 If x = sec 9 —cos B. y see O —cosh O, show that (x2 4) Differentiate sec x' w.r.t. tan x•.