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HP 35s Manual

Solving trigonometry problems
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HP 35s Solving Trigonometry Problems
The trigonometric functions
Trigonometric modes
Practice working problems involving trig functions

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Summary of Contents for HP 35s

  • Page 1 HP 35s Solving Trigonometry Problems The trigonometric functions Trigonometric modes Practice working problems involving trig functions...
  • Page 2 They also occur in solutions to orbital mechanics, integration, and other advanced applications. The HP 35s provides the three basic functions, and their inverse, or “arc” functions. These work in degrees, radians and gradians modes. In addition, π is provided as a function on the left-shifted “cos” key, and the sign function is found in the INTG menu on the left-shifted “tan”...
  • Page 3 Use the cosine rule to calculate the angle. The cosine rule states that for any triangle with sides a, b and c, and angle A facing side a: Figure 5 From this, A can be calculated as: hp calculators - 3 - HP 35s Solving Trigonometry Problems - Version 1.0...
  • Page 4 It would be possible to divide –5 by –8 and calculate the arc tangent, giving approximately 32 degrees, but this would not specify the quadrant in which the vector lies. Fortunately, the 35s complex display modes provide a way to view the complete arc tangent function that recognizes in which quadrant an angle lies.
  • Page 5 Answer: The sign is –1, so the vector direction is down, not up. Note that theÏ following ¹g will choose the first option in the displayed menu. hp calculators - 5 - HP 35s Solving Trigonometry Problems - Version 1.0...