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Angles given (or in a ratio): find sides or ratio of sides by the sine rule

This type of question, asked 7 times: 4 May 2023 S1, 10 May 2023 S1, 10 May 2023 S2, 11 May 2023 S2, 11 May 2024 S2, 12 May 2024 S2, 11 Apr 2026 S1. All 7 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    4 May 2023 S1

    123
    If the angles of a triangle are in the ratio 4:1:14:1:1, then the ratio of the longest side to the perimeter is

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  2. Question 2

    10 May 2023 S1

    125
    If the angles A, B and C of a triangle ABC are in the ratio 2:3:7 respectively, then the sides a, b and c are respectively in the ratio

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  3. Question 3

    10 May 2023 S2

    103
    In a triangle ABC, with usual notations, if m∠A=45∘m\angle A = 45^\circ, m∠B=75∘m\angle B = 75^\circ, then a+c2a + c\sqrt{2} has the value

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  4. Question 4

    11 May 2023 S2

    107
    The angles of a triangle are in the ratio 5:1:6, then ratio of the smallest side to the greatest side is

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  5. Question 5

    11 May 2024 S2

    101
    If the angles of a triangle are in the ratio 4:1:14:1:1, then the ratio of the longest side to its perimeter is

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  6. Question 6

    12 May 2024 S2

    145
    If two angles of △ABC\triangle ABC are π4\frac{\pi}{4} and π3\frac{\pi}{3}, then the ratio of the smallest and greatest sides are

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  7. Question 7

    11 Apr 2026 S1

    62
    In △ABC\triangle ABC, with usual notations, if cos⁡A=12,a=3,∠B=πc6\cos A = \dfrac{1}{2}, a = 3, \angle B = \dfrac{\pi^c}{6}, then the values of bb and cc are.....

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