Geometry and TrigonometryHardSine from a tangent
Geometry and Trigonometry practice question
In a right triangle, tan A = 5/12, where A is one of the acute angles. What is the value of sin A?
Answer: 5/13
Opposite 5 and adjacent 12 give hypotenuse 13, so sin A = 5/13.
Common wrong answers
- If you answered 12/13
- 12/13 is cos A.
- If you answered 5/12
- 5/12 is tan A, not sin A.
- If you answered 13/5
- 13/5 is the reciprocal of sin A.
More Geometry and Trigonometry questions
- Hard
In a right triangle, one leg is 5 and the hypotenuse is 13. What is the length of the other leg? - Hard
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A circle is defined by the equation (x − 3)² + (y + 2)² = 25. What is the radius of the circle? - Hard
What is 135° expressed in radians? - Hard
What is the length of segment PT? - Hard
What is the measure, in degrees, of the central angle of this sector?
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