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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?

OpenStudy (anonymous):

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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?

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

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

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

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

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

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

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?

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

OpenStudy (anonymous):

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