Convert f(x)=(cos x+sin x)(1−sqrt(3) tan x) into the form of k(1+tan x)cos(x+a)

Kareem Mejia

Kareem Mejia

Answered question

2022-11-06

Convert f ( x ) = ( cos x + sin x ) ( 1 3 tan x ) into the form of k ( 1 + tan x ) cos ( x + a ) .

Answer & Explanation

Nigerkamg5

Nigerkamg5

Beginner2022-11-07Added 20 answers

We have to find k and a such that
k ( 1 + tan x ) cos ( x + a ) = ( cos x + sin x ) ( 1 3 tan x )
or
k ( cos x + sin x ) cos ( x + a ) cos x = ( cos x + sin x ) ( 1 3 tan x )
or
k ( cos a sin a tan x ) = ( 1 3 tan x ) .
Now the similarity is obvious.

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