I have an exam tomorow and I ran in to some problems with the following questions: 1. 2sinxcos^3x - 2sin^3xcox and 2. Develop a forumula for sin3x in terms of sinx Thanks in advance.
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Originally Posted by andymac 1. 2sinxcos^3x - 2sin^3xcox 2sinxcos^3x - 2sin^3xcox Factor Both those pieces (inside and outide the []) should look very familiar. 2. Develop a forumula for sin3x in terms of sinx That's almost all you need.
2. Develop a forumula for sin3x in terms of sinx Thanks in advance. And then, you will need these formulae :
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