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Trigonometry

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Please show me the work so i understand

2. Find the reference angle of -11π/3.


5. If θ = –18°, find the exact value of θ in radians.

6.If θ = 3, find the value of θ in degrees correct to the nearest tenth of a degree.

13.The radius of a circle is 6 inches. If the central angle is 5π/3, find the length of the intercepted arc. (Round to the nearest hundredth.)

  • Trigonometry -

    2.
    -11π/3 + 4π = π/3

    5.
    -18° * π rad/180° = π/10 radians

    6.
    3rad * 180°/πrad = 540/π = 171.9°

    13.
    s = rθ = 6*5π/3 = 10π = 31.42 in

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