A 20 − meter line is used to tether a helium-filled balloon. The line makes an angle of approximately 85 ° with the ground because of a breeze. (a) Draw a right triangle that gives a visual representation of the problem. Label the known quantities of the triangle and use a variable to represent the height of the balloon. (b) Use a trigonometric function to write and solve an equation for the height of the balloon. (c) The breeze becomes stronger and the angle the line makes with the ground decreases. How does this affect the triangle you drew in part a ? (d) Complete the table, which shows the heights (in meters) of the balloon for decreasing angle measures θ . (e) As θ approaches 0 ° , how does this affect the height of the balloon? Draw a right triangle to explain your reasoning.
A 20 − meter line is used to tether a helium-filled balloon. The line makes an angle of approximately 85 ° with the ground because of a breeze. (a) Draw a right triangle that gives a visual representation of the problem. Label the known quantities of the triangle and use a variable to represent the height of the balloon. (b) Use a trigonometric function to write and solve an equation for the height of the balloon. (c) The breeze becomes stronger and the angle the line makes with the ground decreases. How does this affect the triangle you drew in part a ? (d) Complete the table, which shows the heights (in meters) of the balloon for decreasing angle measures θ . (e) As θ approaches 0 ° , how does this affect the height of the balloon? Draw a right triangle to explain your reasoning.
Solution Summary: The author explains how to graph a right-angled triangle with known sides and the height of the balloon.
A
20
−
meter line is used to tether a helium-filled balloon. The line makes an angle of approximately
85
°
with the ground because of a breeze.
(a) Draw a right triangle that gives a visual representation of the problem. Label the known quantities of the triangle and use a variable to represent the height of the balloon.
(b) Use a trigonometric function to write and solve an equation for the height of the balloon.
(c) The breeze becomes stronger and the angle the line makes with the ground decreases. How does this affect the triangle you drew in part
a
?
(d) Complete the table, which shows the heights (in meters) of the balloon for decreasing angle measures
θ
.
(e) As
θ
approaches
0
°
,
how does this affect the height of the balloon? Draw a right triangle to explain your reasoning.
Expression, rule, or law that gives the relationship between an independent variable and dependent variable. Some important types of functions are injective function, surjective function, polynomial function, and inverse function.
7. From a point 20 m away on a level ground, the angle of elevation to the bottom of a
the top of the window is 32°. Calculate the
window is 27° and the angle of elevatim
height of the window.
(3 marks)
32
SOUCAHTOA
Rom
Coso-Adj
opponite
1270
H
X
Hyp
Tant=OPP
Adj
20 #
Zom
Adjacent
CoS2E 20 XHX Tanz 20
20
K
-0.0445503261 -1.764201788
0-044550326 60044550320
(1 mark) 3960
8. All odd numbers from 1 to 10 are arranged in descending order to form a number.
(i) Write the number.
35798.
97531
31
(ii) Write the total value of the second digit of the number formed in (a) (i)
FA 7X1000-7000
이
(1 mark)
9. A cylinder has a diameter of 28 cm and the height is 18 cm. Calculate its volume.
2
22 × 14 × 14 × 18
-110880m
3
(3 marks)
10. The figure below shows a right pyramid with AB = 3 cm, BC = 5 cm, and AV
VC = VD = 4 cm. Draw its net.
V
3+
12
7/18
(2/20
2105
SSS
20
Find the exact values of sin(2u), cos(2u), and tan(2u) given
2
COS u
where д < u < π.
2
Establish the identity.
1 + cos u
1 - cos u
1 - cos u
1 + cos u
= 4 cot u csc u
Chapter 1 Solutions
WebAssign Printed Access Card for Larson's Trigonometry, 10th Edition, Single-Term
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