Solve a trigonometric equation using the double angle formulas

Solve a trigonometric equation using the double angle formulas

Assessment

Interactive Video

Mathematics

11th Grade - University

Hard

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The video tutorial explains how to solve a trigonometric equation involving sine functions. It begins by rearranging the equation to bring all terms to one side. The instructor then introduces the double angle formula to simplify the equation further. By factoring out common terms, the equation is solved using the zero product property. The solution is verified using the unit circle, identifying angles where sine and cosine values meet the criteria.

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5 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step suggested by the teacher to solve the equation sine of 2 Theta equals sine of Theta?

Combine the terms directly

Bring both functions to the same side of the equation

Use the inverse operation

Apply the Pythagorean identity

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which formula is used to rewrite sine of 2 Theta in the equation?

Sum-to-product formula

Pythagorean identity

Double angle formula

Half angle formula

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

After applying the double angle formula, what property is used to solve the equation?

Commutative property

Distributive property

Zero product property

Associative property

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

At which angles is sine of Theta equal to 0?

π/6 and 5π/6

π/4 and 3π/4

π/2 and 3π/2

0 and π

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

For which angles is cosine of Theta equal to 1/2?

π/3 and 5π/3

π/4 and 7π/4

π/2 and 3π/2

π/6 and 11π/6