3.2 Trigonometry in triangles

3.2 Trigonometry in triangles Quiz

IB Maths: Applications and Interpretation HL: Quiz

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5 questions, one answer each

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  1. 1. In triangle ABCABC, a=8a=8, A=40∘A=40^\circ and B=75∘B=75^\circ. Find bb.

    • A. 5.325.32
    • B. 12.012.0
    • C. 8.338.33
    • D. 10.410.4

  2. 2. Find cc if a=7a=7, b=9b=9 and C=65∘C=65^\circ.

    • A. 76.876.8
    • B. 13.513.5
    • C. 11.411.4
    • D. 8.768.76

  3. 3. A triangle has sides 5, 6 and 7. Find its largest angle.

    • A. 78.5∘78.5^\circ
    • B. 57.1∘57.1^\circ
    • C. 44.4∘44.4^\circ
    • D. 101.5∘101.5^\circ

  4. 4. A triangle has sides 8 and 11 with an included angle of 35∘35^\circ. Find its area.

    • A. 50.550.5
    • B. 36.036.0
    • C. 25.225.2
    • D. 44.044.0

  5. 5. You know two sides of a triangle and the angle between them, and need the third side. Which rule do you use?

    • A. The sine rule
    • B. The cosine rule
    • C. SOH CAH TOA only
    • D. The area formula

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