# precalculus

Suppose that
θ
is an angle in standard position whose terminal side intersects the unit circle at
, 35/37−12/37
.

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1. ok.

It appears to be in QIV, and is a 12-35-37 right triangle.

If you draw it correctly, you should be able just to read off the values of the trig functions of that angle.

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2. ok, I am supposing Ø to be as you stated, now what?

did you notice that 35^2 + (-12)^2 = 37^2 ?
Do you know the basic trig ratios in terms of the x, y, and r of the corresponding right-angled triangle?

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3. no that why I ask

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4. what will sin , cot, csc be for that >

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5. sketch a right-angled triangle.
label the horizontal base as x
the vertical side as y
the hypotenuse as r, and the base angle as Ø

memorize these ratios:
sinØ = y/r
cosØ = x/r
tanØ = y/x
and now their reciprocals:
cscØ = 1/sinØ = r/y
secØ = 1/cosØ = r/x
cotØ = 1/tanØ = x/y

You will not be able to handle trig questions without knowing these.

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