Tuesday, June 2, 2015

Can (sec x - cosec x) / (tan x - cot x) be simplified further?

Given the expression ( sec x - csec x ) / (tan x - cot
x)


We need to simplify.


We
will use trigonometric identities to simplify.


We know
that:


sec x = 1/cos x


csec x =
1/sin x


tan x = sinx/cosx


cot
x = cos x/ sin x


We will substitute into the
expression.


==> (1/cos x - 1/sin x ) / (sin x / cos
x - cos x/ sin x)


==>[ ( sin x - cos x) / sinx*cosx]
/ [ (sin^2 x - cos^2 x)/ cosx*sinx


We will reduce
similar:


==> (sinx - cos x) / (sin^2 x - cos^2
x)


Now we will simplify the
denominator.


==> (sin x - cos x) / (sin x - cos
x)(sinx + cos x)


Reduce similar
terms.


==> 1/ (sin x + cos
x)


Then the expression ( sec x - csec
x)/(tanx - cot x) can be written as : 1/(sin x + cos
x)

No comments:

Post a Comment