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# Math 2 Formulas

Registered User Posts: 369 Member
edited October 2010
Do we need to know them? I think double angle formulas would come in handy, but what about half angles and sum/diff formulas?
Post edited by eagertolearn on

## Replies to: Math 2 Formulas

• Registered User Posts: 369 Member
bump 10 char. Please answer! It's a very simple question...
• Registered User Posts: 4,276 Senior Member
I don't recall any half angle or sum/difference questions on the June 2010 test. If you're paranoid, you could always store them in your calculator (or use a calculator with a CAS (e.g. the TI-89) and have the calculator spit out the formula).
• Registered User Posts: 369 Member
haha I already programmed double angle stuff into my calc...
thank you!
• Registered User Posts: 2,039 Senior Member
why would you need that.

Sin (47) => use calculator
Sin (A+B) => sinAcosB+sinBcosA
• Registered User Posts: 369 Member
because....you either memorize it (which i already did ages ago) or you just plug it into your calculator if you don't know it or you do both to be safe.
This discussion has been closed.