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Straighterline MAT201 PRECALCULUS GRADED EXAM 1 (New Version August 2024)
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Question 1 Incorrect 0.00 points out of 6.25   Suppose that the # key is pressed on a phone keypad. a. Write a function representing this sound as the sum of two sine waves. b.Write a function representing this sound as the product of sines and cosines. Select one: a. a. b. b. a. b. c...

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  • August 21, 2024
  • 13
  • 2024/2025
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Straighterline PRECALCULUS GRADED EXAM 1 (New Version August 2024)
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Question 1

Incorrect

0.00 points out
of 6.25




y = sin(2πlt) + sin(2πht)
l h




Suppose that the # key is pressed on a phone keypad.
a. Write a function representing this sound as the sum of two sine waves.
b.Write a function representing this sound as the product of sines and cosines.

Select one:
a. a. y = sin(1882πt) + sin(2954πt)
b. y = 2sin(2418πt)cos(536πt)
b. a. y = sin(941πt) + sin(1477πt)
b. y = 2sin(2418πt)cos(536πt)
c. a. y = sin(1882πt) + sin(2954πt)
b. y = 2cos(1209πt)sin(268πt)
d. a. y = sin(941πt) + sin(1477πt)
b. y = 2cos(1209πt)sin(268πt)




https://moodle.straighterline.com/mod/quiz/review.php?attempt=5824770&cmid=82688 2/14

, 8/21/24, 6:11 PM Graded Exam #3: Attempt review




Question 2
Provide the missing information.
Correct

6.25 points out sin (−x) = −sin x, cos(−x) = cos x and tan (−x) = ________________.
of 6.25
Select one:
a. −tan x



b. sin x


c. −cos x


d. tan x




Question 3
Simplify the expression. Write the final form with no fractions.
Correct

6.25 points out tan2 x + 2tan x + 1
of 6.25 tan2 x + tan x

Select one:
a. 1 + tan x
b. 1 + cot x
c. 1 + csc x
d. tan x




https://moodle.straighterline.com/mod/quiz/review.php?attempt=5824770&cmid=82688 3/14

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