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January 30, 2015

January 30, 2015

Posted by **Lucy** on Saturday, April 26, 2008 at 10:28am.

Answer: (sqrt6 + sqrt2)/4

2) Simplify: (4m/5n^2)- (n/2m)

Answer: (8m^2-5n^3)/10n^2m

Thanks

- Algebra II -
**Reiny**, Saturday, April 26, 2008 at 10:46amThe answer they gave you for the first one is not correct.

Here is the right way:

sin 165

= sin(120+45)

= sin120cos45 + cos120sin45

= sin60sin45 + (-cos60sin45)

= (√3/2)(√2/2) - (1/2)(√2/2)

= (√6 - √2)/4

(my answer checked with calculator)

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