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#### metallicamaster3

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Not even a clue where to start

#### ablearcher

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sohcahtoa

sin = op/hyp
cos = adj/hpy
tan = op/adj (or sin/cos)

csc= 1/sin
sec = 1/cos
cot = 1/tan

sorry if I am not more help, I'm kinda lazy after a APGov test, today...

#### metallicamaster3

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chugging along, I got about 3 done so far.

positive acute angle; cos(600)?

#### ablearcher

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cos600

600-360 = 240

cos240

negative, I think?

ASTC?

#### metallicamaster3

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Express the function as a positive acute angle:
csc(-850)

o_o

#### SirLagALot

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csc(-850) = csc(230)
= 1/sin(230)
= -1/sin(50)

#### metallicamaster3

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Quote:
 Originally Posted by SirLagALot csc(-850) = csc(230) = 1/sin(230) = -1/sin(50)

Keep a chuggin, I'm all good up till 9 now

#### 1keith1

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Number 9 has to be in quadrant two. (the upper left)

Tan<0 which means X or Y (aka adjacent or opposite) has to be negative

Since Sin=5/12 Y>0 which means x<0

5^2 + X^2=12^2
X^2=119
X= root of 119

Cos= -root119/12
Tan= -5/root119
CSC=12/5
Sec=-12/root119
Cot=-root119/5

Don't forget the negative signs!!

#### SirLagALot

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10) So just find a range of values for theta which agree with cos x >0
11) Can't read it properly
12) Oh wait it's just I don't know what that symbol means
13) Just arccos (sqrt2/2) and put it into sin
14) Ditto, arccot
15) Dunno that symbol
16) arcsec

Hope this helps, even though I couldn't help with half of them because of that weird symbol

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