Question

anyonee....
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

Answer 1

This requires use of the double angle equation, and then manipulating one side or the other. The double angle formulas are attatched. For the triple angle (tangent3x) you will have to use a sum formula (tangent2x+x), which I am also attatching. Using these two equations, you should be able to break it down into parts that have a degree no higher than a squared term. Use basic identities and manipulate one side.