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September 19, 2014

September 19, 2014

Posted by **lindsay** on Tuesday, May 21, 2013 at 5:39am.

1. tan 75 degrees

2. Cos 15 degrees

3. Sin 105 degrees

- math -
**Steve**, Tuesday, May 21, 2013 at 11:30amyou know the values for 30 and 45 degrees

use your sum/difference and half-angle formulas

75=45+30

15=30/2

105=90+15

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