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Trigonometric relations in right triangles Videos 8 videos
ACT Math: Trigonometry Drill 4, Problem 3. What is the length of side b?
ACT Math: Trigonometry Drill 3, Problem 2. What is the value for side DF on this triangle?
ACT Math: Trigonometry Drill 1, Problem 1. What is the length of y?
ACT Math 5.5 Trigonometry 215 Views
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ACT Math: Trigonometry Drill 5, Problem 5. What is the length of side z?
- Trigonometry / Solving right triangles
- Trigonometry / SOHCAHTOA (values and properties of trig functions)
- Product Type / ACT Math
- Foreign Language / Arabic Subtitled
- Foreign Language / Korean Subtitled
- Foreign Language / Chinese Subtitled
- Foreign Language / Spanish Subtitled
- Trigonometry / Trigonometric relations in right triangles
Transcript
- 00:02
Time for your daily dose of shmoop. This won't hurt a bit.
- 00:06
tan(B) = 5/12. What is the length of side z?
- 00:11
Choose from these options...
- 00:16
How do we find this length with the information given? Well... remember our triangle trig ratios?
- 00:23
Tangent of an angle is the length of the opposite side of the angle over the adjacent side of
Full Transcript
- 00:30
the angle. Okay... Pythagorean Theorem time.
- 00:33
Five squared plus twelve squared equals z squared.
- 00:37
25 plus 144 equals z squared.
- 00:39
169 equals z squared.
- 00:41
Taking the square root of both sides, we get that 13 equals z, which means B is the correct
- 00:47
answer. Oh, and one last thing.
- 00:49
5, 12, 13 is a common right triangle that you should memorize for the test. Don't let
- 00:54
it ambush you on test day.
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