For Sin and Cos are easy but what about Sec?

Ex) Sec(-pi/12)

what would the sum and difference formula look like?

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- Jun 9th 2008, 07:27 PMgabrie30Sum and Difference Formulas
For Sin and Cos are easy but what about Sec?

Ex) Sec(-pi/12)

what would the sum and difference formula look like? - Jun 9th 2008, 07:30 PMmr fantastic
- Jun 9th 2008, 07:42 PMgabrie30
- Jun 9th 2008, 07:49 PMJonboy
you need to simplify the bottom of the fraction that

**mr fantastic**gave you.

go here: Table of Trigonometric Identities

Look under "**Sum-Difference Formulas**"

Then pick the second one that involves Cos.