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Mathematics 9 Online
OpenStudy (anonymous):

help please In △PQR, find the measure of ∡P.

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

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\[\sin \theta=\frac{ opp }{ hyp }\]

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.

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 \[\sin \theta=0.5868\]

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

OpenStudy (joannablackwelder):

No worries :)

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