Trigonometric Identities and Functions

Trigonometric Identities and Functions

Assessment

Interactive Video

Mathematics

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial covers two main trigonometric questions. The first question involves reducing angles greater than 200 degrees and applying trigonometric identities to simplify expressions. The second question focuses on simplifying fractions by finding a common denominator and rearranging terms. The lesson emphasizes the use of grade 11 trigonometric knowledge and formula sheets to solve complex expressions.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What should you do if you want to attempt the questions on your own?

Pause the video and try solving them.

Skip to the end of the video.

Wait for the teacher to solve them.

Ignore the questions.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When dealing with angles greater than 200 degrees, what is a common approach?

Ignore the angle.

Always add 180 degrees.

Reduce the angle using trigonometric identities.

Multiply the angle by 2.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the sine of 200 degrees equivalent to?

cos 20

-sin 20

-cos 20

sin 20

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What should you look for on a formula sheet when you see a pattern in trigonometric expressions?

The sum of angles formula.

The tangent formula.

The double angle identity.

The Pythagorean identity.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the result of multiplying two negative trigonometric values?

An undefined value.

A negative value.

A positive value.

Zero.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the double angle identity for sin(2a)?

sin^2(a) + cos^2(a)

2sin(a)cos(a)

tan(a) + cot(a)

sin(a) + cos(a)

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can you express sin(20)cos(20) using a double angle identity?

sin(40)/2

sin(40)

cos(40)

2sin(40)

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