Evaluate trig functions without using a calculator using cofunction identities

The video tutorial covers trigonometric functions, focusing on sine and cosine, and their properties. It explains cofunction identities, using the unit circle to understand angle relationships, and solving trigonometric problems. The tutorial also explores tangent and cotangent functions, emphasizing the importance of understanding these concepts for problem-solving in trigonometry.

What is the sine of 60 degrees?

• 1

• 1/2

• 0

• sqrt 3 / 2

Which of the following is true for complementary angles?

• Sine of an angle equals cosine of its complementary angle

• Cosine of an angle equals sine of the same angle

• Sine of an angle equals cosine of the same angle

• Cosine of an angle equals sine of its complementary angle

If the cosine of 60 degrees is 1/2, what is the sine of 30 degrees?

• 0

• 1

• sqrt 3 / 2

• 1/2

What is the relationship between the sine of 60 degrees and the cosine of 30 degrees?

• Cosine is double the sine

• They are unrelated

• Sine is double the cosine

• They are equal

How can you calculate the tangent of an angle?

• Sine divided by cosine

• Cosine divided by sine

• Sine multiplied by cosine

• Cosine minus sine

What is the cotangent of 60 degrees if the tangent is sqrt 3?

• 2

• 1/2

• sqrt 3

• 1/sqrt 3

What is the result of rationalizing the denominator of 1/sqrt 3?

• sqrt 3 / 3

• 1/3

• sqrt 3

• 3/sqrt 3