Write and evaluate expression using sum and difference identities

Write and evaluate expression using sum and difference identities

Assessment

Interactive Video

Mathematics

11th Grade - University

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

The video tutorial explains how to solve a trigonometric expression without using a calculator. The teacher guides students through recognizing and applying the sine formula for the difference of two angles. By identifying the relationship in the expression, the teacher demonstrates how to simplify and solve it, emphasizing the sine of 90 degrees equals 1.

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5 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main challenge mentioned by the teacher when evaluating trigonometric functions without a calculator?

Confusion with algebraic expressions

Difficulty in calculating exact values

Inability to recognize angles

Lack of understanding of trigonometric identities

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which trigonometric formula does the teacher identify in the expression?

Sine formula

Secant formula

Cosine formula

Tangent formula

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of angle operation is identified in the sine formula?

Sum of two angles

Difference of two angles

Product of two angles

Division of two angles

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the sine of 90 degrees as concluded by the teacher?

0

0.5

Undefined

1

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What mathematical operation does the teacher emphasize cannot be distributed in the given problem?

Subtraction

Addition

Division

Multiplication

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