Exploring Adding and Subtracting Rational Expressions

What is the primary benefit of knowing the unit circle for trigonometric problems?

• It is only useful for calculus.

• It helps in understanding complex numbers.

• It is necessary for solving equations on the test.

• It allows for graphing without a calculator.

Which trigonometric function corresponds to the y-coordinate on the unit circle?

• Sine

• Cosine

• Tangent

• Cotangent

What is the period of the sine function?

• 2 Pi

• Pi

• Pi/2

• 4 Pi

How do you find the second angle for cosine equals 0.7 in quadrant four?

• Add 180 degrees to the first angle.

• Multiply the first angle by -1.

• Subtract the first angle from 360 degrees.

• Use inverse cosine again.

What is added to the angle found by inverse cosine to find all solutions?

• Pi k

• 2 Pi k

• 180k

• 360k

What is the period of the tangent function when measured in degrees?

• 360 degrees

• 180 degrees

• 90 degrees

• 270 degrees

What is the inverse function used to solve for cosecant?

• Inverse cotangent

• Inverse tangent

• Inverse cosine

• Inverse sine

How do you adjust the solution for equations involving radians to ensure they fall within the interval 0 to 2 Pi?

• No adjustment needed

• Multiply by 2 Pi

• Subtract 2 Pi k

• Add 2 Pi k

In which quadrant is sine positive and equal to a half?

• Quadrant I

• Quadrant II

• Quadrant III

• Quadrant IV

What mathematical operation is used to find the standard angle in quadrant two for sine equals a half?

• Add Pi to the reference angle

• Subtract the reference angle from Pi

• Multiply the reference angle by 2

• Divide Pi by the reference angle