cos(x) to sec(x)

**sadieann** · December 11th 2008, 06:02 PM

If cos(x) = -0.6, find the value of sec(x) accurate to two decimals

**Skalkaz** · December 11th 2008, 06:09 PM

Dear sadieann,

do you know the definition of sec = secant?

I had not known it but I looked for it quick.

**nzmathman** · December 11th 2008, 06:29 PM

Hint: $\sec(x) = \frac{1}{\cos(x)}$

**Erdos32212** · December 11th 2008, 07:39 PM

So, $\frac{1}{\cos(x)}$ = $\frac{1}{-0.6}$ =-1.66666667 $\Box$ .

**Prove It** · December 11th 2008, 07:41 PM

Originally Posted by Erdos32212

So, $\frac{1}{\cos(x)}$ = $\frac{1}{-0.6}$ =-1.66666667 $\Box$ .

Keep it accurate to 2 decimal places.

Thread: cos(x) to sec(x)