Question

Verify that each trig equation is an identity.
cot s + tan s=sec s csc s
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Answer 1

cot x + tan x = sec x*csc x
cos x/sin x + sin x/cos x = (1/cos x)*(1/sin x)
(cos^2 x + sin^2 x)/sin x*cos x = 1/sin x*cos x
cos^2 x + sin^2 x = 1. This is a popular trig identity.