The functions are usually abbreviated: sine (sin), cosine (cos), tangent (tan) cosecant (csc), secant (sec), and cotangent (cot). |
Even/Odd Formulas sin(−θ) = −sin(θ) csc(−θ) = −csc(θ) cos(−θ) = cos(θ) sec(−θ) = sec(θ) tan(−θ) = −tan(θ) cot(−θ) = −cot(θ). Periodic Formulas. |
We can write csc sec cot formulas in terms of sin cos tan as given below: csc x = 1/sin x; sec x = 1/cos x; cot x = 1/tan x. |
17 окт. 2015 г. · See explanation. Explanation: Prove: (sinx+cosx)(tanx+cotx)=secx+cscx. The change I made in each step is colored red. |
The cotangent of x is defined to be the cosine of x divided by the sine of x: cot x = cos x sin x . The secant of x is 1 divided by the cosine of x: sec x = 1. |
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