Walking on a surface Consider the following surfaces specified in the form z = f ( x, y ) and the oriented curve C in the xy-plane. a. In each case, find z’ ( t ) . b. Imagine that you are walking on the surface directly above the curve C in the direction of positive orientation. Find the values of t for which you are walking uphill ( that is, z is increasing ) . 54. z = 4 x 2 − y 2 + 1 , C : x = cos t , y = sin t ; 0 ≤ t ≤ 2 π
Walking on a surface Consider the following surfaces specified in the form z = f ( x, y ) and the oriented curve C in the xy-plane. a. In each case, find z’ ( t ) . b. Imagine that you are walking on the surface directly above the curve C in the direction of positive orientation. Find the values of t for which you are walking uphill ( that is, z is increasing ) . 54. z = 4 x 2 − y 2 + 1 , C : x = cos t , y = sin t ; 0 ≤ t ≤ 2 π
Solution Summary: The author explains that the value of zprime is -5mathrmsin2t.
Walking on a surfaceConsider the following surfaces specified in the form z = f(x, y) and the oriented curve C in the xy-plane.
a. In each case, find z’ (t).
b. Imagine that you are walking on the surface directly above the curve C in the direction of positive orientation. Find the values of t for which you are walking uphill (that is, z is increasing).
54.
z
=
4
x
2
−
y
2
+
1
,
C
:
x
=
cos
t
,
y
=
sin
t
;
0
≤
t
≤
2
π
4
In the integral dxf1dy (7)², make the change of variables x = ½(r− s), y = ½(r + s), and
evaluate the integral. Hint: Find the limits on r and s by sketching the area of integration in the (x, y) plane along
with the r and s axes, and then show that the same area can be covered by s from 0 to r and r from 0 to 1.
7. What are all values of 0, for 0≤0<2л, where 2 sin² 0=-sin?
-
5π
6
π
(A) 0, л,
and
6
7π
(B) 0,л,
11π
, and
6
6
π 3π π
(C)
5π
2 2 3
, and
π 3π 2π
(D)
2' 2'3
, and
3
4元
3
1
די
}
I
-2m
3
1
-3
บ
1
#
1
I
3#
3m
8. The graph of g is shown above. Which of the following is an expression for g(x)?
(A) 1+ tan(x)
(B) 1-tan (x)
(C) 1-tan (2x)
(D) 1-tan
+
X
-
9. The function j is given by j(x)=2(sin x)(cos x)-cos x. Solve j(x) = 0 for values of x in the interval
Quiz A: Topic 3.10
Trigonometric Equations and Inequalities
Created by Bryan Passwater
can you solve this question using the right triangle method and explain the steps used along the way
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, calculus and related others by exploring similar questions and additional content below.
Numerical Integration Introduction l Trapezoidal Rule Simpson's 1/3 Rule l Simpson's 3/8 l GATE 2021; Author: GATE Lectures by Dishank;https://www.youtube.com/watch?v=zadUB3NwFtQ;License: Standard YouTube License, CC-BY