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If tan theta equals 2, then the sides of the triangle could be -2, -1, and square root of 5 (I used the Pythagorean Theorem to get this). From this, sec theta is negative square root of 5. It is negative because theta is in the third quadrant, where cosine, secant, sine, and cosecant are all negative.

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Q: What is sec theta if tan theta equals 2 with theta in quadrant 3?

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It also equals 13 12.

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Cotan(theta) is the reciprocal of the tan(theta). So, cot(theta) = 1/2.

Ut is equual to tan(theta) / (sec(theta) + 1)

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tan theta = sqrt(2)/2 = 1/sqrt(2).

Yes, it is.

Yes. (Theta in radians, and then approximately, not exactly.)

copy this and paste in your browsers address window http://www.wolframalpha.com/input/?i=tan+theta+%2B+sec+theta+%3D1

Let 'theta' = A [as 'A' is easier to type] sec A - 1/(sec A) = 1/(cos A) - cos A = (1 - cos^2 A)/(cos A) = (sin^2 A)/(cos A) = (tan A)*(sin A) Then you can swap back the 'A' with theta

If tan(theta) = x then sin(theta) = x/(sqrt(x2 + 1) so that csc(theta) = [(sqrt(x2 + 1)]/x = sqrt(1 + 1/x2)

The value of tan and sin is positive so you must search quadrant that tan and sin value is positive. The only quadrant fill that qualification is Quadrant 1.

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