Question: 4) Prove that tan x sin x + cos x = sec x 5) Simplify each of the following trigonometric expressions a) sin u +

4) Prove that tan x sin x + cos x =

sec x 5) Simplify each of the following trigonometric expressions a) sin

4) Prove that tan x sin x + cos x = sec x 5) Simplify each of the following trigonometric expressions a) sin u + cot u cos u b) sin x cos2x - sin x

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