Why does the teacher prefer to stay within the first quadrant when selecting angles?

Teacher's Strategies for Simplifying Expressions

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Mathematics
•
9th - 10th Grade
•
Hard

Thomas White
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28 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To avoid negative angles
To simplify calculations
To make the problem more complex
To use larger angles
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the teacher's preferred angle subtraction in the example?
45 degrees minus 60 degrees
60 degrees minus 30 degrees
30 degrees minus 45 degrees
45 degrees minus 30 degrees
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of parentheses in the cosine formula?
They indicate the order of operations
They are optional and can be ignored
They are used to denote multiplication
They help in distinguishing between negative and positive values
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the cosine formula for u minus v, what operation is performed when the formula indicates a minus?
Subtract
Add
Multiply
Divide
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the cosine of 30 degrees according to the unit circle?
Square root of 2 over 2
1/2
1
Square root of 3 over 2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the sine of 45 degrees according to the unit circle?
1/2
1
Square root of 3 over 2
Square root of 2 over 2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the non-simplified answer for the cosine of 30 degrees minus 45 degrees?
Square root of 3 over 2 times square root of 2 over 2 plus 1/2 times square root of 2 over 2
Square root of 2 over 2 times square root of 3 over 2 plus 1/2
Square root of 6 over 4
Square root of 2 over 2 times square root of 3 plus 1 over 2
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