R-Flashcard Identities (Basic & Sum/Diff)

Flashcard
•
Mathematics
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the identity for the sum of angles in cosine?
Back
The identity is: cos(A + B) = cos(A)cos(B) - sin(A)sin(B)
2.
FLASHCARD QUESTION
Front
What is the identity for the difference of angles in cosine?
Back
The identity is: cos(A - B) = cos(A)cos(B) + sin(A)sin(B)
3.
FLASHCARD QUESTION
Front
What is the Pythagorean identity?
Back
4.
FLASHCARD QUESTION
Front
What is the definition of secant?
Back
Secant is defined as: sec(x) = 1/cos(x).
5.
FLASHCARD QUESTION
Front
What is the definition of cosecant?
Back
Cosecant is defined as: csc(x) = 1/sin(x).
6.
FLASHCARD QUESTION
Front
What is the definition of cotangent?
Back
Cotangent is defined as: cot(x) = 1/tan(x) = cos(x)/sin(x).
7.
FLASHCARD QUESTION
Front
Simplify: sec(θ) cot(θ) sin(θ)
Back
The simplified result is 1.
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