7. What is the simplified value of -2 sin (x + 15°) when x 30° ? С. —2 D. -V2 A. 2 60 B. V2 Whet ie the velu the figure o n the right 30

Elementary Geometry For College Students, 7e
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Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
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ChapterP: Preliminary Concepts
SectionP.CT: Test
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7. What is the simplified value of -2 sin (x + 15°) when x 30° ?
А. 2
В. 2
8. What is the value of z on the figure on the right?
С. —2
60°C
D. -V2
30
C. 4V3
D. 4V5
A. 4V6
45
В. 4/2
9. Michael flew a kite which has a string of 100 meters long and it makes an
angle of 60° with the horizontal. What is the height of the kite? (assuming
that there is no slack in the string)
A. (5+ 5V3) m
B. 50/3 m
C. 5V3
D. 30V5 m
Transcribed Image Text:7. What is the simplified value of -2 sin (x + 15°) when x 30° ? А. 2 В. 2 8. What is the value of z on the figure on the right? С. —2 60°C D. -V2 30 C. 4V3 D. 4V5 A. 4V6 45 В. 4/2 9. Michael flew a kite which has a string of 100 meters long and it makes an angle of 60° with the horizontal. What is the height of the kite? (assuming that there is no slack in the string) A. (5+ 5V3) m B. 50/3 m C. 5V3 D. 30V5 m
E. Assume that the slope of one
WERBANS
of the stairs in Marikina
Riverbanks
Amphitheater
have 30° angle with the
ground and has a vertical
30
18
height of 18 feet. Your friend
says that the length of the
slope
is
18V3
or
approximately 31.2 feet and
the trigonometric function to be used is tangent function. Is he correct?
Why or Why not?
o What I Have Learned
Complete the table below to show the values of trigonometric ratios for special
angles 30°, 45°, and 60° without the aid of calculator.
sin
cos
sec
tan
cot
csc
1
30°
V3
45°
1
2
V3
1
V3
60°
2
2
3
Transcribed Image Text:E. Assume that the slope of one WERBANS of the stairs in Marikina Riverbanks Amphitheater have 30° angle with the ground and has a vertical 30 18 height of 18 feet. Your friend says that the length of the slope is 18V3 or approximately 31.2 feet and the trigonometric function to be used is tangent function. Is he correct? Why or Why not? o What I Have Learned Complete the table below to show the values of trigonometric ratios for special angles 30°, 45°, and 60° without the aid of calculator. sin cos sec tan cot csc 1 30° V3 45° 1 2 V3 1 V3 60° 2 2 3
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