Mathematics
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OpenStudy (anonymous):
help please
In △PQR, find the measure of ∡P.
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OpenStudy (anonymous):
OpenStudy (anonymous):
30.4°
35.9°
59.6°
54.1°
OpenStudy (joannablackwelder):
Are you familiar with the trig ratios?
OpenStudy (anonymous):
no
OpenStudy (anonymous):
not really @JoannaBlackwelder
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OpenStudy (joannablackwelder):
Ok. I think you will need them for this problem, so let me give you a quick rundown.
OpenStudy (joannablackwelder):
In a right triangle, the ratios of the sides are always in proportion to each other.
OpenStudy (anonymous):
@aryandecoolest @zepdrix
OpenStudy (joannablackwelder):
The ratio of the opposite side (to a particular angle) and the hypotenuse of the triangle is called the sin of the angle.
OpenStudy (joannablackwelder):
Usually written like\[\sin \theta=\frac{ opp }{ hyp }\]
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OpenStudy (anonymous):
30.4
OpenStudy (joannablackwelder):
Where the opposite side length is the side that is not touching the angle in question.
OpenStudy (joannablackwelder):
Please ignore the answer given. Does what I said make sense so far?
OpenStudy (anonymous):
yeah its good @JoannaBlackwelder
OpenStudy (joannablackwelder):
The answer given is actually incorrect anyway.
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OpenStudy (joannablackwelder):
Sweet.
OpenStudy (anonymous):
what do i do next? @JoannaBlackwelder
OpenStudy (joannablackwelder):
You set up the equation with the information given:
\[\sin \theta=\frac{ 33.8 }{ 57.6 }\]
OpenStudy (anonymous):
sorry it's coming 35.45, but not in option.
OpenStudy (joannablackwelder):
Simplify to give \[\sin \theta=0.5868\]
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OpenStudy (anonymous):
is it 35.9? @JoannaBlackwelder
OpenStudy (joannablackwelder):
Yeah, that is what I get. Did you take the inverse sin?
OpenStudy (anonymous):
yes
OpenStudy (joannablackwelder):
And I thought you said you didn't know anything about trig ratios. ;)
OpenStudy (anonymous):
lol i has a good teacher, thank you so much
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OpenStudy (joannablackwelder):
No worries :)