How to determine the function and angle given an expression

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Mathematics
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11th Grade - University
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary purpose of evaluating angles using trigonometric formulas?
To solve algebraic equations
To calculate the area of a triangle
To find the exact angle from an expression
To memorize the formulas
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which formula represents the cosine of the sum of two angles?
cos(U + V) = tan(U) + tan(V) / 1 - tan(U)tan(V)
cos(U + V) = sin(U)cos(V) + cos(U)sin(V)
cos(U + V) = cos(U)cos(V) - sin(U)sin(V)
cos(U + V) = sin(U)sin(V) + cos(U)cos(V)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can you identify a difference formula for sine?
By confirming it is a rational expression
By checking if the formula has only addition
By looking for mixed sine and cosine terms with subtraction
By ensuring all terms are cosine
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a key characteristic of the tangent formula?
It is always a sum formula
It is the only rational formula among sine and cosine
It involves only cosine terms
It is always a difference formula
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important to distinguish between sum and difference formulas?
Because they determine whether to add or subtract angles
Because they are only applicable to tangent
Because they are interchangeable
Because they are used in different mathematical fields
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