Is Secant the reciprocal of cosine?

In addition to sine, cosine, and tangent, there are three other trigonometric functions you need to know for the Math IIC: cosecant, secant, and cotangent. These functions are simply the reciprocals of sine, cosine, and tangent. Cotangent is the reciprocal of tangent.
A.

Is inverse cosine the same as Arccos?

Arccos definition. The arccosine of x is defined as the inverse cosine function of x when -1≤x≤1. (Here cos-1 x means the inverse cosine and does not mean cosine to the power of -1).
  • What is the definition of inverse cosine?

    Noun. 1. inverse cosine - the inverse function of the cosine; the angle that has a cosine equal to a given number. arc cosine, arccos, arccosine. circular function, trigonometric function - function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angle.
  • What angle has a cosine of 1?

    Sines and cosines for special common angles
    DegreesRadianscosine
    90°π/20
    60°π/31/2
    45°π/4√2 / 2
    30°π/6√3 / 2
  • What is the CSC in trig?

    The functions are usually abbreviated: sine (sin), cosine (cos), tangent (tan) cosecant (csc), secant (sec), and cotangent (cot). It is often simpler to memorize the the trig functions in terms of only sine and cosine: sin(q) = opp/hyp. csc(q) = 1/sin(q)

Updated: 2nd October 2019

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