Mathematics
18 Online
OpenStudy (anonymous):
The dimensions of the right triangle shown below are given in units. Picture will be attached. Which measure is CLOSEST to m< RTQ?
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OpenStudy (anonymous):
|dw:1368041645044:dw|
OpenStudy (anonymous):
|dw:1368041850537:dw|
OpenStudy (anonymous):
the answer choices are: A. 20.6 B. 22.0 C. 68.0 D. 69.4
OpenStudy (anonymous):
@doppler
OpenStudy (anonymous):
where is the m?
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OpenStudy (anonymous):
it seems i cant understand what the problem exactly wants us to find,i cant see m in the diagram
OpenStudy (anonymous):
ah RTQ is the angle of T
OpenStudy (anonymous):
so you have tan(RTQ)=8/3 and you need to find RTQ
OpenStudy (anonymous):
so (RTQ)=tan-1(8/3) right?
OpenStudy (anonymous):
yea
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OpenStudy (anonymous):
can u use a calculator?i mean ..is it allowed for this question?
OpenStudy (anonymous):
yes
OpenStudy (anonymous):
well, mine is not exactly an actuall scientific calculator, so i dont really know how to work with this kinda stuff on it
OpenStudy (anonymous):
and btw, m< RTQ means measure of angle RTQ.
OpenStudy (anonymous):
ah kk well i calculated it 69.4 with my scientific
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OpenStudy (anonymous):
ok thank u, thats one of the answer choices
OpenStudy (anonymous):
69.3967 tbh
OpenStudy (anonymous):
so 69.4 yeah
OpenStudy (anonymous):
k wanna help me with 3 more
OpenStudy (anonymous):
sure
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OpenStudy (anonymous):
|dw:1368042732246:dw|
OpenStudy (anonymous):
The drawing below represents a 22-foot ladder with its base placed 10 feet from the bottom of a vertical wall. Which value is the best ESTIMATE for x?
OpenStudy (anonymous):
this is easy
OpenStudy (anonymous):
if you could do the previous then you can do that as well
OpenStudy (anonymous):
i am soo bad at math though
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OpenStudy (anonymous):
what you did before?you used tan to find the angle .now what do we need to find the angle x?
OpenStudy (anonymous):
i never know if its cos, sin, tan and how to label the sides like adj,hyp,opposite
OpenStudy (anonymous):
so 22 ft side will be hypotenuse
OpenStudy (anonymous):
yeah
OpenStudy (anonymous):
the angle across from the hypotenuse is always the..._____ i forgot which one
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OpenStudy (anonymous):
sin=opp/hyp , cos=adj/hyp ,tan=opp/adj so what do we need now?
OpenStudy (anonymous):
10 ft is the opposite?
OpenStudy (anonymous):
what do we have given?
OpenStudy (anonymous):
we will use sin
OpenStudy (anonymous):
10 ft is the closest side to our angle
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OpenStudy (anonymous):
the opposite is the wall
OpenStudy (anonymous):
because x ''looks'' at the wall , the wall is not near x
OpenStudy (anonymous):
oh
OpenStudy (anonymous):
ohhh ok
OpenStudy (anonymous):
so its opp/hyp right?
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OpenStudy (anonymous):
opposite is the wall,do we have the length of the wall?
OpenStudy (anonymous):
nope
OpenStudy (anonymous):
so we dont know the opposite so if we put our known variables in sinx=opp/hyp we have 2 unknowns ...is it desirable?
OpenStudy (anonymous):
what do u mean two unknowns?
OpenStudy (anonymous):
o i think i get it
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OpenStudy (anonymous):
|dw:1368043413423:dw|