Answer to Question #15539 in Trigonometry for liezel guevarra

Question #15539

tan x+sin x sec x- sin x cos x/sec x-csc x=tan x+sin x sec x

Expert's answer

tan x+sin x sec x- sin x cos x/sec x-csc x=tan x+sin x sec x

The bolded parts are equal, so that means that - sin x cos x/sec x-csc x=0 for all x, but this is false.

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