Question: How is question 9 done? Prove its true. (sec x - cos x)(csc x - sin x) = 1 + tan x 9. sec x

How is question 9 done? Prove its true.

How is question 9 done? Prove its true. (sec x - cos

(sec x - cos x)(csc x - sin x) = 1 + tan x 9. sec x - tan x = 1+3tan xsec x 11 sin (x+ y 1 + cot x tan y = sin x cos y 13 (3TC 3TT

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