Proving Trig IDs
One standard my students did not meet is in regards to proving a relationship between two identities true. One strategy I have used is to start with the more complicated expression and through algebraic manipulation like substitution, addition/subtraction of rational expression, and multiplying by a special value of one, and so on, they will eventually arrive at the desired expression. And if that doesn't work, I suggest to my students to work both expression. All this seems time consuming and only the students that know their algebra are successful. Besides exposing them to more practice and exposure, does anyone have other strategies? We emphasize the use of a 2-column t-chart table structure to arrive at the conclusion that LHS = RHS. Thank you!
- Differentiation / Planning