Understanding the Law of Sines and the Ambiguous Case

The video tutorial covers the Law of Sines, focusing on the ambiguous case of Side-Side-Angle (SSA). It explains how to determine the number of possible triangles based on given angles and sides, using trigonometry to calculate heights and angles. The tutorial provides scenarios for both acute and obtuse angles, followed by example problems to illustrate the concepts.

What is the ambiguous case in the context of the Law of Sines?

• A scenario where exactly two triangles can be formed.

• A scenario where no triangle can be formed.

• A scenario where one, none, or two triangles can be formed.

• A scenario where only one triangle can be formed.

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CCSS.HSG.SRT.D.11

How do you calculate the height of a triangle in the SSA case?

• Using the cosine of the given angle.

• Using the sine of the given angle.

• Using the tangent of the given angle.

• Using the cotangent of the given angle.

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In the SSA case, if the given angle is acute and the side opposite is less than the hypotenuse, what is the result?

• One triangle can be formed.

• A right triangle can be formed.

• No triangle can be formed.

• Two triangles can be formed.

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CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

What is the first step in solving a triangle using the Law of Sines when the given angle is acute?

• Determine if the angle is obtuse.

• Find the measure of the third angle.

• Calculate the height of the triangle.

• Compare the side opposite the angle with the hypotenuse.

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CCSS.7.G.A.2

If the side opposite the given acute angle is greater than the adjacent side, how many triangles can be formed?

• No triangle can be formed.

• One triangle can be formed.

• Two triangles can be formed.

• A right triangle can be formed.

When the given angle is obtuse, what condition must be met for a triangle to exist?

• The side opposite the angle must be less than the adjacent side.

• The side opposite the angle must be equal to the adjacent side.

• The side opposite the angle must be less than or equal to the adjacent side.

• The side opposite the angle must be greater than the adjacent side.

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CCSS.7.G.A.2

In the SSA case, if the given angle is obtuse and the side opposite is less than the adjacent side, what is the result?

• A right triangle can be formed.

• One triangle can be formed.

• No triangle can be formed.

• Two triangles can be formed.

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CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

What should you do if you encounter an error message while solving for an angle using the Law of Sines?

• Try a different trigonometric function.

• Check if the triangle is obtuse.

• Recalculate using a different angle.

• Conclude that no triangle can be formed.

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CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

What is the significance of using four decimal places in calculations?

• It makes the calculations more complex.

• It is a standard practice in all calculations.

• It helps in reducing rounding errors.

• It ensures the calculations are faster.

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CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

What is the final step in solving a triangle using the Law of Sines?

• Find the length of the missing side.

• Verify the angle measurements.

• Determine the type of triangle.

• Calculate the height of the triangle.

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CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11