The Codex of Business Writing Software for Real-World Solutions 2.pptx
DEV
1. Developing Expert Voices Pre Calculus 40S enriched 2007 My name is Sandy and I like the colour purple. DEV PROJECT
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26. Problem Three - answers DEV PROJECT Here we simply just multiplied everything out. Just like we were doing before, to get rid of the double fraction we multiplied the numerator by the reciprocal of the denominator. The sinΘ’s reduce!
27. Problem Three - answers DEV PROJECT You then end up with this after you reduce! You’re probably wondering how the heck does cos 2 Θ equal 1-sin 2 Θ? Well, knowing our identities: sin 2 Θ + cos 2 Θ = 1 If we rearrange the order, we can see that cos 2 Θ = 1-sin 2 Θ If you notice, 1-sin 2 Θ is a difference of squares. SO, it is easily factorable.
28. Problem Three - answers DEV PROJECT The 1-sinΘ’s reduce. And you’re left with 1+sinΘ! Q.E.D *When You’re finished solving, you must always put Q.E.D to indicate that you are finished.