Difference Formula

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March 17th 2010, 06:09 PM
purplec16

Difference Formula

$tan 105$

$tan (60+45)$

$\frac{tan 60 + tan 45}{1 - tan 60 tan 45}$

$\frac{\sqrt{3}+1}{1-\sqrt{3}}$

$-2-\sqrt{3}$

Is this correct?
March 17th 2010, 06:19 PM
skeeter

Quote:

Originally Posted by purplec16

$tan 105$

$tan (60+45)$

$\frac{tan 60 + tan 45}{1 - tan 60 tan 45}$

$\frac{\sqrt{3}+1}{1-\sqrt{3}}$

$-2-\sqrt{3}$

Is this correct?

check it with your calculator ... you have one, right?

some things you need to check yourself.

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