Practice Important Note (2.2) - Trigonometry Basics - IB 10 Mathematics

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6 sample questions

Question 1.
What are the three primary trigonometric ratios?
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Think of the relationships in a right triangle.
Question 2.
For which angles are trigonometric ratios valid?
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Consider the triangle's angles.
3Question 3.
What is the range of angles for which trigonometric ratios are defined?
- 0° to 90°
- 0° to 180°
- 90° to 360°
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Think about the properties of right triangles.
4Question 4.
True or False: Sine, cosine, and tangent can be used for angles greater than 90°.
- True
- False
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Reflect on our discussion about angle limitations.
Question 5.
A right triangle has an angle of 85°, and the hypotenuse is 12 cm. Calculate the length of the side opposite this angle and explain your reasoning.
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Remember the sine definition!
Question 6.
Explain what would happen if you tried to find sine for an angle of 95° in terms of the triangle properties.
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Consider triangle definitions and valid angles.

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