Fundamental Identities

What is the reciprocal function of cot(x)?

• tan(x)

• cos(x)

• sin(x)

• csc(x)

What is the reciprocal function of csc(x)?

• sec(x)

• cos(x)

• sin(x)

• tan(x)

What is the reciprocal function of sec(x)?

• cos(x)

• sin(x)

• tan(x)

• cot(x)

What is the reciprocal function of sin(x)?

• sec(x)

• cos(x)

• cot(x)

• csc(x)

Fill in the blank:

tan(x) = ____ / cos(x)

• sin(x)

• cos(x)

• sec(x)

• csc(x)

Fill in the blank:

cot(x) = ____ / sin(x)

• sin(x)

• cos(x)

• tan(x)

• csc(x)

Fill in the blank:

cot(x) = cos(x) / _____

• sin(x)

• cos(x)

• tan(x)

• csc(x)

Fill in the blank:

tan(x) = sin(x) / _____

• sin(x)

• cos(x)

• sec(x)

• csc(x)

Which of the following is NOT a pythagorean identity?

• sin²x + cos²x = 1

• 1 - cos²x = sin²x

• 1 - sin²x = cos² x

• sin²x - cos²x = -1

Which of the following is NOT a pythagorean identity?

• 1 + tan²x = sec²x

• sec²x - 1= tan²x

• tan²x - sec²x = -1

• tan²x - 1 = -sec²x