NEW CUSTOMER? sign-in here OLD CUSTOMER? Enter your email address to activate an existing shopping cart or to retrieve previously purchased downloads. You have 0 items in your shopping cart.		Essential Trigonometry Reference Sheet Ever find yourself wishing you could remember that one dumb trig identity? Or the domain of arcsine? Or the law of cosines?      No more! Here in one place are all the important facts and niggling details: Degree and radian definitions and conversions Definitions of the six trig functions Graphs of all six trig functions Definitions and graphs of arcsin, arccos, and arctan, with domain and range. Laws of sines and cosines. Commonly used angles and their function values Reduction Formulas Fundamental Equivalences Pythagorean Identities Double and Half-Angle Formulas Angle Sum and Difference Formulas Function Product, Sum, and Difference Formulas All of the above has been specially formatted for printing on a single, easy to read page, punch-holes marked for quick insertion into a notebook or ring-binder. Formats: pdf Download fee: $1.65		Platonic Realms downloadables are special resources which you may save, use, and/or print on your own computer for a nominal download fee. Once you have selected your download(s), "proceed to checkout" takes you to the Amazon Honor System on the Amazon.com web site. Your transaction is completed using Amazon’s secure and convenient payment system, and you are then returned to the Math Academy Online web site to download your selections. For more info, please view our FAQ.

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