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You are here: Experts > Science > Physics > Physics > Trigonometry
Physics - Trigonometry
Expert: Richard J. Raridon - 11/5/2009
Question
I need help with these mister.
(NOTICE ABOUT THESE QUESTIONS)
Show enough of your work to indicate how your answers were obtained. We will not accept answers alone. When you complete your work, examine it closely, correct all the errors you can find, and see that every question is answered.
Below are the questions in a link, I'm trying to make my questions as clear as I can and this was the only way to do it. The link below goes directly to questions.
http://trigonometryquestions.blogspot.com/
Thanks!
Answer
1. 1/2 = 1-2(1/4) = 1/2
2. a. 12(1/2)-(6/2)(2^1/2) +(2^1/2)/52 =
b. (3^1/2)/2 +1 -(3^1/2)/2 +2^1/2 = 1 +2^1/2
3. sin(x) = 4/5, tan(x) = 4/3
4. x/17 = 3/4 so x = 12.75, 17^2 = (12.75^2+y^2)^1/2 so y = 11.24
5. don't you have a calculator to do these?
a. 0.38617, b. 0.70793, c. 0.75794, d. 0.20557, e. 0.98291, f. 2.9031, g. 2.0606
h. 0.86808, i. 0.19866, j. 0.96495
6. a. 18deg 3' 1", b. 62deg 14' 59", c. 39deg 24' 1", d. 81deg 26', e. 6deg 6' 59"
f. 56deg 14' 28", g. 67deg 5' 25", h. 7deg 40' 30", i. 72deg 5' 15", j. 41deg 10' 21"
7. cos(28.7) = h/375.5 so h = 329.4 ft
8. a. c = (117^2 +16.35^2)^1/2 = 118.14
b. cos(8.48333) = 32.8/c so c = 33.163, sin(8.48333) = b/33.163 so b = 4.8922
9. sin(36.3667) = 550/x so x = 927.6 ft
10. tan(30) = h/(x+6) and tan(45) = h/x so h = 8.196 ft
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