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anonymous
 one year ago
GIVE MEDAL!!
In right ∆ABC, m B = 90°, m C = 40°, and BC = 10. What are the other two side lengths of the triangle?
AC = 13.1, AB = 8.4
AC = 18.7, AB = 15.8
AC = 14.3, AB = 10.2
AC = 15.6, AB = 11.9
anonymous
 one year ago
GIVE MEDAL!! In right ∆ABC, m B = 90°, m C = 40°, and BC = 10. What are the other two side lengths of the triangle? AC = 13.1, AB = 8.4 AC = 18.7, AB = 15.8 AC = 14.3, AB = 10.2 AC = 15.6, AB = 11.9

This Question is Closed

iGreen
 one year ago
Best ResponseYou've already chosen the best response.1We can use Sine, Cosine, and Tangent to find the remaining sides..

iGreen
 one year ago
Best ResponseYou've already chosen the best response.1\(\sf Sine=\dfrac{Opposite}{Hypotenuse}\) \(\sf Cosine=\dfrac{Adjacent}{Hypotenuse}\) \(\sf Tangent = \dfrac{Opposite}{Adjacent}\) Here, we are given the adjacent side, and we want to find the opposite and the hypotenuse.

iGreen
 one year ago
Best ResponseYou've already chosen the best response.1Hehe, it would be if you got it yourself :P

iGreen
 one year ago
Best ResponseYou've already chosen the best response.1So to find the hypotenuse, we can use cosine. \(\sf Cosine=\dfrac{Adjacent}{Hypotenuse}\) Plug in what we know: \(\sf cos(90^o) = \dfrac{10}{x}\)

iGreen
 one year ago
Best ResponseYou've already chosen the best response.1Hmm..I think that's right..I'm not sure about which angle to use..I haven't done this in a while..

iGreen
 one year ago
Best ResponseYou've already chosen the best response.1Okay, 90 degrees is wrong..

iGreen
 one year ago
Best ResponseYou've already chosen the best response.1Okay, I think we use 40 degrees..

iGreen
 one year ago
Best ResponseYou've already chosen the best response.1So: \(\sf cos(40^o) = \dfrac{10}{x}\) Type in \(\sf cos(40^o)\) into your calculator, tell me what you get.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i dont have a scientific one ..its ok ill guess but thx for help ill give tht medal :)

iGreen
 one year ago
Best ResponseYou've already chosen the best response.1You can use google, just type in "cos 40 degrees"

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0a big decimal so ill put 0.766

iGreen
 one year ago
Best ResponseYou've already chosen the best response.1Yep, so we have: \(\sf 0.766 = \dfrac{10}{x}\) Solve for 'x'

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so i times the decimal and 10?

iGreen
 one year ago
Best ResponseYou've already chosen the best response.1Well, you can switch 'x' and 0.766 around. \(\sf x = \dfrac{10}{0.766}\) So just divide

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0it was a big decimal so i round it and got tht

iGreen
 one year ago
Best ResponseYou've already chosen the best response.1Sorry, my internet just went out for a few seconds there.

iGreen
 one year ago
Best ResponseYou've already chosen the best response.1Yes, I think that's correct.
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