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Mathematics 19 Online
OpenStudy (anonymous):

Can you help here please? determine the exact value of 1/cot θ.

OpenStudy (anonymous):

|dw:1334010062956:dw|

OpenStudy (anonymous):

because tangent is negative in the 4th quadrant....

OpenStudy (anonymous):

cos(theta) = 2/3 with theta in quadrant 4. 1/cot(theta) = tan(theta) = -sqrt5/2

OpenStudy (anonymous):

wait, sorry Im being slow, Im just trying to process the information:)

OpenStudy (anonymous):

Can you explain the question for me? I dont really understand it

OpenStudy (anonymous):

np... that's how you get good at these... process it...

OpenStudy (anonymous):

shoot.

OpenStudy (anonymous):

they give you a value for cosine of theta which is the ratio 2/3. they also give you that theta is an angle in the 4th quadrant. the question is to find 1/cot(theta)... the exact value....

OpenStudy (anonymous):

so the part tht confused me was and 270 < theta 360

OpenStudy (anonymous):

this means that it is in 4th quadrant?

OpenStudy (anonymous):

yes...

OpenStudy (anonymous):

Ohhh. If they asked 2nd or 1st quadrant, how would they ask it?

OpenStudy (anonymous):

well they definitely can't say that theta is in the second quadrant because the ratio they gave is positive 2/3. cosine in the second quadrant is negative. but they could say theta is in the first quadrant by stating 0<theta<90 degrees.

OpenStudy (anonymous):

Ohhh, so If i draw this in the unit circle, Id get: |dw:1334010630149:dw|

OpenStudy (anonymous):

right?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

so are the points placed here correctly?|dw:1334010678242:dw|

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