# 10th Grade Trigonometry Part I (Nikoleta Simeonova)

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ACS_Math
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Quizzes Created: 6 | Total Attempts: 763
Questions: 20 | Attempts: 90

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• 1.

### , . For and is true that:

• A.
• B.
• C.
• D.

Cannot be defined.

B.
• 2.

### , . For  and is true that:

• A.
• B.
• C.
• D.

Cannot be defined.

A.
• 3.

B.
• 4.

### The value of the following expression is:

• A.

0

• B.

1

• C.

-1

• D.
• E.
C. -1
Explanation
The value of the expression is -1 because when you subtract 1 from 0, the result is -1.

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• 5.

• A.
• B.
• C.
• D.

2

D. 2
• 6.

• A.
• B.
• C.

1

• D.

Undefined

• E.

0

• F.

-1

B.
• 7.

• A.
• B.

-1

• C.

1

• D.

0

• E.
• F.
C. 1
• 8.

### Define the value of the following expression .

1
Explanation
The value of the expression is 1 because there is no operation or variable given in the question. Therefore, the expression is simply the number 1.

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• 9.

• A.

True

• B.

False

B. False
• 10.

### The following identity is true or false:

• A.

True

• B.

False

A. True
Explanation
The given question asks if a certain identity is true or false. The answer provided is "True," indicating that the identity is indeed true. However, without any information about the specific identity mentioned in the question, it is not possible to provide a detailed explanation for why it is true.

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• 11.

### The value of the following expression is:

• A.

>0

• B.

• C.

=0

• D.

Cannot be defined.

B.
Explanation
The given expression is a comparison between two values, 0 and 0. When comparing two equal values, the result is true, which can be represented as 1. Therefore, the value of the expression is 1.

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• 12.

### The value  of the following expression is:

• A.

• B.

>0

• C.

=0

• D.

Cannot be defined.

A.
• 13.

2
• 14.

-cotgx
• 15.

### For any angle , the value of the expression is: (you can choose more than one option)

• A.

1

• B.

-1

• C.

Sinx+cosx

• D.

-sinx-cosx

• E.
• F.
C. Sinx+cosx
D. -sinx-cosx
Explanation
The given expression is sinx+cosx and -sinx-cosx. For any angle, the value of sinx and cosx varies depending on the angle. Therefore, the value of sinx+cosx and -sinx-cosx will also vary depending on the angle. Hence, both options sinx+cosx and -sinx-cosx can be correct for any angle.

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• 16.

2
• 17.

### (you can choose more than one option)

• A.

0.5

• B.

-0.5

• C.
• D.
• E.

0

• F.
• G.
A. 0.5
Explanation
The correct answer is 0.5 because it is the only positive value among the given options. Both -0.5 and 0 are negative or non-positive values, respectively.

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• 18.

### If , what is the value of the expression ?

• A.

Cannot be defined.

• B.
• C.

-7

• D.

7

• E.

0

B.
Explanation
The expression cannot be defined because the value of a number divided by zero is undefined in mathematics.

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• 19.

### If , what is the value of the expression ?

• A.

Cannot be defined.

• B.

-2

• C.

2

• D.
• E.
• F.
D.
• 20.

### Simplify the expression:

1

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• Current Version
• Nov 28, 2023
Quiz Edited by
ProProfs Editorial Team
• Feb 20, 2013
Quiz Created by
ACS_Math

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