Tuesday, October 27, 2009
Yesterdays class was a catch up period, one of my favs. I worked on some accelerated math, and got 79%, wasn't bad, but I have to do some objectives over again which sucks. I was very happy we got a catch up block because I am somewhat behind in this class. And stressing over this math test comming up on thursday.
Tuesday, October 20, 2009
Today in class we did some more practice/considerations with identities. We learned about EXTRANEOUS roots.- "they are answers that look good on paper but practically don't make sense".
When we are doing our questions, all solutions must be checked for validity. In an equation you want to bring everything to one side, and when you have a question like cos(x)+1=sqare root thre sin(x), you always want to sqare both terms to get rid of the radical.
When we are doing our questions, all solutions must be checked for validity. In an equation you want to bring everything to one side, and when you have a question like cos(x)+1=sqare root thre sin(x), you always want to sqare both terms to get rid of the radical.
Monday, October 19, 2009
Today in class we learned how to simplify. Completely. And learned techniques to assist "proofing" idenities. There was eight different techniques. Such as reduce/simplify, work each side independently to some intermediate expression, DO the multiplication/subtraction of the rational expressions, Simplify GCF'S ALWAYS, FACTOR, try multiplyinf both numerators/ denominators by same expression, and lastly, if possible rewrite all trig. functions as sin(x) or cos(x); look for patterns.
And we learned to prove by LHS and RHS. I find it kind of complicating,but hopefully I will catch on.
And we learned to prove by LHS and RHS. I find it kind of complicating,but hopefully I will catch on.
Friday, October 16, 2009
Thursday, October 15, 2009
Tuesday, October 13, 2009
Thursday, October 8, 2009
Last class we learned reciprocal functions. Reciprocal means fliped over. ex) a/b---->b/a. We learned that a reciprocal function is in which the numerator and denominator switch places. Then we learned how to graph it. The graph of a reciprocal function, compared to its orig. function, is curved and has one or more asymptotes along the x axis. The asymptote of the reciprocal function is found where the function crosses over the x axis. If the orig. function decreases, the reciprocal function will increase. We leanred this as: "GREATERING" and "LESSERING".
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