Geometry and TrigonometryEasy–MediumCosine from two legs
Geometry and Trigonometry practice question
In right triangle PQR, the right angle is at Q, PQ = 9, and QR = 12. What is the value of cos P?
Answer: 3/5 or .6 or 0.6
The hypotenuse PR is 15. cos P is the adjacent side PQ over the hypotenuse: 9/15 = 3/5.
Common wrong answers
- If you answered 4/5
- 4/5 is sin P.
- If you answered 3/4
- 3/4 is tan P.
- If you answered 9/12
- 9/12 uses the other leg instead of the hypotenuse.
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- Easy–Medium
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What is the midpoint of the segment joining the points (2, 3) and (8, 11)? - Easy–Medium
What is the measure, in degrees, of angle B? - Easy–Medium
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