# 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 anglesDegrees Radians cosine 90° π/2 0 60° π/3 1/2 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