Evaluate limits with cosine and cotangent

The video tutorial covers evaluating cotangent and simplifying trigonometric expressions. It explains how to rewrite expressions using cosine and sine, and how to simplify fractions by multiplying with reciprocals. The tutorial also discusses direct substitution and the significance of π in trigonometry, encouraging students not to fear trigonometry.

What is the cotangent of an angle in terms of sine and cosine?

• Sine over tangent

• Sine over cosine

• Cosine over sine

• Tangent over sine

How can you simplify a trigonometric expression by using the reciprocal?

• By multiplying by the reciprocal

• By adding the reciprocal

• By subtracting the reciprocal

• By dividing by the reciprocal

What happens to the cosine terms when simplifying the expression cosine over one times sine over cosine?

• They add up

• They remain unchanged

• They multiply

• They divide out

What is the significance of π/2 in the unit circle?

• It is the x-coordinate

• It is the y-coordinate

• It is the origin

• It is the radius

What is the value of sine at π/2?

• 1

• -1

• 0

• Undefined