Question: Use the commands from Section 11.2 to show that: (a) tan(3x) = 3tanx- tan3x/1- 3tan2x (b) sin(x + y + z) = sinxcosycosz + cosxsinycosz

Use the commands from Section 11.2 to show that:
(a) tan(3x) = 3tanx- tan3x/1- 3tan2x
(b) sin(x + y + z) = sinxcosycosz + cosxsinycosz + cosxcosysinz - sinxsinysinz

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