Home |
Normal
Version IE Version |
Search | BBS | Guest Book | Site Map | Help | Contact us | About us |

Download RealPlayer IntroductionEssenceMemorizingUnderstandingSummarizingExamplesExercisesFinal thoughts |
## 4. Understanding the formulasIn section 2, we learned that the process of verifying an identity
is also the process of reducing the three differences between
the two sides in the identity. The three differences are For example, ,
remember that both sides of the equation are equal, so it's OK
to use it from either side. If we use it from the right side to
the left side, then we can see that From left to right, the function is changed from Here is an example, .
If we use it from left side to the right side, this formula changes
the operation from addition to multiplication, and deletes the
angle
and the functions Moving one term from the left side to the right side in the formula
,
for example, we have .
Then from the left to right side, this formula helps us to change
function |
|||

LWR

Questions? Comments? Contact
us.

© Copyright 1998 LWR, ThinkQuest team
17119. All rights reserved.