Question

Verify each trigonometric equation by substituting identities to match the right hand side of the equation to the left hand side of the equation.

1. cot x sec4x = cot x + 2 tan x + tan3x

2. (sin x)(tan x cos x - cot x cos x) = 1 - 2 cos2x


3. 1 + sec2x sin2x = sec2x

Answer 1

1 cotx sec4x

=cotx(1+ 2tan2x+tan4x)

=cotx+2tanx+tan4x