Trigonometric Identities Worksheet With Answers Page 21
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2513-1 Trigonometric Identities
Option J is the correct answer.
53. SAT/ACT Ella is 6 years younger than Amanda. Zoe is twice as old as Amanda. The total of their ages is 54.
Which equation can be used to find Amanda’s age?
A
B
C
D
E
SOLUTION:
Let x be the age of Amanda.
Therefore, the ages of Ella, Amanda and Zoe are x – 6, x , 2x.
Given:
.
Option D is the correct answer.
54. Which of the following functions represents exponential growth?
F
G
H.
J
SOLUTION:
To be an exponential growth, the value in the parenthesis must be greater than one. The variable will be in the
exponent.
Therefore, option G is the correct answer.
Find each value. Write angle measures in radians. Round to the nearest hundredth.
55.
SOLUTION:
Use a calculator.
–1
KEYSTROKES: 2nd [COS
] (–) 1 ÷ 2 ) ENTER .
56.
SOLUTION:
Use a calculator.
–1
KEYSTROKES: 2nd [SIN
] 2nd [π] ÷ 2 ) ENTER .
57.
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Page 21
SOLUTION:
Use a calculator.
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