Question 3 a) The function f, where f(x) secx, has domain 0

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.3: The Natural Exponential Function
Problem 4E
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Question 3
a)
The function f, where f(x) secx, has domain 0<x< and has inverse function
f-l, where f-(x) = secx.
Show that
secx= cos
X3COS
-!
Hence show that
(secx)3D
dr
b)
1
di +
1
dr = ln a.
Given that
find the exact value of a.
v16+9x
V9+4x-
c)
A drilling machine is to have 8 speeds ranging from 100 rev/min to 1000
rev/min. If the speeds form a geometric progression determine their values, each
correct to the nearest whole number and explain your results.
Transcribed Image Text:Question 3 a) The function f, where f(x) secx, has domain 0<x< and has inverse function f-l, where f-(x) = secx. Show that secx= cos X3COS -! Hence show that (secx)3D dr b) 1 di + 1 dr = ln a. Given that find the exact value of a. v16+9x V9+4x- c) A drilling machine is to have 8 speeds ranging from 100 rev/min to 1000 rev/min. If the speeds form a geometric progression determine their values, each correct to the nearest whole number and explain your results.
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