let's recall that an inverse function has the same pair of coordinates as the original function, but backwards, or namely the inverse's range is the original's domain.

Given:
The function is

To find:
The inverse of the given function.
Solution:
We have,

Put f(x)=y.

Interchange x and y.

Isolate the variable y.




Putting
, we get

For
,




It means for function
and for inverse function
because the range of the function is the domain of inverse function.
Therefore,
for
.
The perimeter of each figure is 58
Answer:
Option d. 
Step-by-step explanation:
<u><em>The complete question is</em></u>
Given (1+cosx)/(sinx) + (sinx)/(1+cosx) =4, find a numerical value of one trigonometric function of x.
a. tanx=2
b. sinx=2
c. tanx=1/2
d. sinx=1/2
we have

Find the common denominator and adds the fractions

Expanded the numerator

Remember that
----> trigonometric identity
substitute


Factor 2 in the numerator

Simplify


Each number is 1/3 of the number before it.
After 18 come 6, 2, 2/3, 2/9, 2/27, 2/81, ... etc.