Trigonometric ratios, sine and cosine rules and area

Trigonometric ratios, sine and cosine rules and area Quiz

Spec 5.1 · Edexcel A-Level Maths: Quiz

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  1. 1. Find cos⁡240∘\cos240^\circ.

    • A. 12\frac12
    • B. −32-\frac{\sqrt3}{2}
    • C. −12-\frac12
    • D. 32\frac{\sqrt3}{2}

  2. 2. In triangle ABCABC, A=30∘A=30^\circ, a=8a=8 and b=11b=11. How many different triangles are possible?

    • A. 00
    • B. 11
    • C. 33
    • D. 22

  3. 3. In triangle ABCABC, b=3b=3, c=8c=8 and A=60∘A=60^\circ. Find aa.

    • A. 97\sqrt{97}
    • B. 77
    • C. 73\sqrt{73}
    • D. 4949

  4. 4. Find the area of a triangle with sides 88 and 99 and included angle 150∘150^\circ.

    • A. 1818
    • B. 3636
    • C. 31.231.2
    • D. 7272

  5. 5. Which angle between 0∘0^\circ and 360∘360^\circ has sin⁡θ=−12\sin\theta=-\frac12 and cos⁡θ>0\cos\theta>0?

    • A. 150∘150^\circ
    • B. 210∘210^\circ
    • C. 330∘330^\circ
    • D. 30∘30^\circ

Quiz