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sin cos tan O H A H O A H csc O H sec A A cot O
Since $\tan(25\pi/2)$ is undefined, and $\cot x = \frac{1}{\tan x}$, then why isn't $\cot(25\pi/2)$ undefined instead of $0$? - Mathematics Stack Exchange
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Elements of plane and spherical trigonometry . angle is the reciprocal of thetangent of the angle. Thus, cot A AG AGXBG B,G etc. (8) The secant (sec) of an angle is
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What are the five trigonometric functions of [math]\cot(7)[/math] in the third quadrant? - Quora
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What is the need of trigonometric ratios cosec, sec, and cot as they are just reciprocals of sin, cos and tan? Why are they given much importance? - Quora
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2. Sine, Cosine, Tangent and the Reciprocal Ratios
