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5 Written questions

5 Multiple choice questions

  1. trigonometric ratio: abbreviation tan; the tangent of an acute angle in a right triangle equals the side opposite the angle divided by the adjacent side (tan A = opp/adj)
  2. Mnemonic device to help remember the trig ratios in a right triangle: sin = opp/hyp; cos = adj/hyp; tan = opp/adj
  3. The angle formed when looking up from the horizontal
  4. trigonometric ratio: abbreviation cos; the cosine of an acute angle in a right triangle equals the side adjacent to the angle divided by the hypotenuse (cos A = adj/hyp)
  5. Special right triangle: hypotenuse = shorter side 2; longer side = shorter side sqrt(3)

5 True/False questions

  1. Inverse Trig RatioGives us the measure of the angle whose sin/cos/tan is a given ratio value. "Undoes" sin, cos, or tan. Written using a "-1" (looks like an exponent, but isn't). Also called "arc," such as arcsin, arccos, arctan. Example: arcsin(1/2) = 30 degrees. Useful in finding missing angle values in right triangles.

          

  2. trigonometric ratiosGives us the measure of the angle whose sin/cos/tan is a given ratio value. "Undoes" sin, cos, or tan. Written using a "-1" (looks like an exponent, but isn't). Also called "arc," such as arcsin, arccos, arctan. Example: arcsin(1/2) = 30 degrees. Useful in finding missing angle values in right triangles.

          

  3. Solve a triangleIn a triangle with shorter sides a and b and longer side c, if a^2 + b^2 > c^2, then the triangle is acute

          

  4. Acute triangleIn a triangle with shorter sides a and b and longer side c, if a^2 + b^2 < c^2, then the triangle is obtuse

          

  5. 45-45-90 right triangleSpecial right triangle: isosceles right triangle where the legs are congruent and the hypotenuse = leg * sqrt(2)

          

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