Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 8)

• 1

  What is the purpose of using trigonometric ratios?

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  (D)

  All of the above.
• 2

  What is the correct relationship in the Sine Rule?

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  (C)

  Sides are proportional to the sines of the opposite angles.
• 3

  In a cuboid, given sides a, b, and c, what is the method for finding the length of the space diagonal?

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  (C)

  √(a² + b² + c²)
• 4

  Which of the following statements are true about angles of elevation and depression?

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  A

  B

  D
• 5

  In triangle ABC, if angle A is 90 degrees, side AB is 3, and side AC is 4, what is the length of side BC?

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  (C)

  5
• 6

  What does 'bearing' represent in the context of navigation and trigonometry?

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  (B)

  An angle measured clockwise from North.
• 7

  What is the value of cos(45°)?

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  (C)

  √2 / 2
• 8

  In the formula for the area of a triangle, Area = 1/2 * a * b * sin C, what does sin(C) mean?

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  (A)

  The sine of angle C
• 9

  Which of the following equations is equivalent to cos(θ) = Adjacent / Hypotenuse?

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  (A)

  θ = cos^-1(Adjacent / Hypotenuse)
• 10

  The formula for the area of a triangle is Area = 1/2 * ab * sin C. What does 'C' represent in this formula?

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  (C)

  The angle between sides a and b