R-Flashcard Identities (Basic & Sum/Diff)

R-Flashcard Identities (Basic & Sum/Diff)

Assessment

Flashcard

Mathematics

9th - 12th Grade

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the exact value of cos 105°?

Back

cos 105° = -√3/2

2.

FLASHCARD QUESTION

Front

What is the Pythagorean identity for sine and cosine?

Back

sin²(x) + cos²(x) = 1

3.

FLASHCARD QUESTION

Front

What is the cosecant function in terms of sine?

Back

csc(x) = 1/sin(x)

4.

FLASHCARD QUESTION

Front

How can you express cos(175°)cos(55°) + sin(175°)sin(55°) in terms of a single cosine function?

Back

cos(175°)cos(55°) + sin(175°)sin(55°) = cos(120°) (using the cosine addition formula).

5.

FLASHCARD QUESTION

Front

What is the simplified form of sec(θ) cot(θ) sin(θ)?

Back

sec(θ) cot(θ) sin(θ) = 1.

6.

FLASHCARD QUESTION

Front

What is the cosine of the sum of two angles formula?

Back

cos(A + B) = cos(A)cos(B) - sin(A)sin(B).

7.

FLASHCARD QUESTION

Front

What is the sine of the difference of two angles formula?

Back

sin(A - B) = sin(A)cos(B) - cos(A)sin(B).

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