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IBSL1 Non-Right Angled Trigonometry (Chapter 8)

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  • Given A= 63 degrees, B = 49 degrees, and b = 18 cm, find a.
    21.3 cm
  • Find the area of a triangle with sides a = 6 cm, b = 9 cm, and angle C = 83 degrees
    26.8 square cm
  • Find the area of a triangle with sides a = 7 km, c = 8 km, and angle B = 30 degrees
    14 square km
  • Find the obtuse angle whose cosine is the negative of: 84 degrees
    96 degrees
  • Find the area of a triangle with sides b = 7.6 m, c = 9.3 m, and angle A = 111 degrees
    33 square m
  • Find the acute angle which has the same sine as: 120 degrees
    60 degrees
  • Find Cos C, if a = 8, b = 6, and c = 12
    -44/96 = -11/24 = -0.45833_
  • What is the Law of Sines?
    sin A / a = sin B / b = sin C / c
  • What is the sine of pi/2 degrees? NO CALC
    sqrt(4)/2 = 2/2 = 1
  • Find Cos A, if a = 3, b = 6, and c = 7
    76/84 = 19/21 = 0.9047619
  • Find the acute angle which has the same sine as: 165 degrees
    15 degrees
  • What is Ms. Czopek's kitten's name?
    Simba
  • Given A= 82 degrees, C = 25 degrees, and c = 34 cm, find b.
    76.9 cm
  • When's Ms. Czopek's Birthday?
    Oct 2nd
  • What is the cosine of 60 degrees? NO CALC
    sqrt(1)/2 = 1/2
  • What is the cosine of 45 degrees? NO CALC
    sqrt(2)/2
  • Given B = 21 degrees, C = 48 degrees, and a = 6.4 cm, find c.
    5.09 cm
  • What is the sine of 45 degrees? NO CALC
    sqrt(2)/2
  • Find the obtuse angle whose cosine is the negative of: 19 degrees
    161 degrees
  • What is the sine of 30 degrees? NO CALC
    sqrt(1)/2 = 1/2
  • Find Cos B, if a = 4, b = 6, and c = 8
    44/64 = 11/16 = 0.6875
  • What is the Law of Cosines? State all 3 versions.
    a^2 = b^2 +c^2 -2bc cosA, b^2 = a^2 + c^2 -2ac cosB, c^2 = a^2 +b^2 - 2ab cos C
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