Table of Contents

## What is the formula for SEC 2x?

First, sec2x=1cos2x. Write 1 as cos2x+sin2x and cos2x as cos2x−sin2x. Then sec2x=cos2x+sin2xcos2x−sin2x. Next, divide top and bottom (of the right hand side) by cos2x and use the fact that 1+tan2x=sec2x.

## What does Sec 2 x equal?

sec(2x) = 1cos(2x) = 1cos(x+x) = 1cosx⋅cosx+sinx⋅sinx [Expanded using addition identity]

**Is SEC 2x 1 tan 2x an identity?**

This is readily derived directly from the definition of the basic trigonometric functions sin and cos and Pythagoras’s Theorem. Confirming that the result is an identity. Yes, sec2−1=tan2x is an identity.

**How do you type SEC 2x into a calculator?**

For the “2” part of sec2θ, most calculators that have an x2 key require you to compute cosθ first, and then use the x2 key.

### Is Sec 2 x the same as sec x 2?

SOLVED! It is not. edit: In particular, note that sec2(x) is always positive, whereas sec(x2) really isn’t. (Plus sec(x2) does some other stuff on account of squaring x first.)

### Does tan 2x SEC 2x?

**Is Sec 2 an identity?**

Yes, sec2−1=tan2x is an identity.

**How is the range of secx made up of two intervals?**

be no smaller than 1, and if it is negative, it can be no larger than ¡1. Thus the range of secx is made up of two intervals: secx ‚ 1 or secx • ¡1: The period of secx is precisely the same as that of cosx, which means that the period of secx is 2…. The function secx is an even function, and this is because cosx is an even function. Finally, at

## Is the period of secx the same as cosx?

The period of secx is precisely the same as that of cosx, which means that the period of secx is 2 … . The function sec x is an even function, and this is because cos x is an even function.

## Is the range of cscx the same as secx?

The range of cscx is the same as that of secx, for the same reasons (except that now we are dealing with the multiplicative inverse of sine of x , not cosine of x ). Therefore the range of csc x is

**Which is the formula for the cosecant of X?**

secx = 1 cosx; and the cosecant of x is deﬁned to be 1 divided by the sine of x: cscx = 1 sinx: If you are not in lecture today, you should use these formulae to make a numerical table for each of these functions and sketch out their graphs. Below we list the major properties of these four functions, including