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March 31, 2015

March 31, 2015

Posted by **Kate** on Friday, July 15, 2011 at 4:47pm.

sin30° + cos225° + sin150° + cos330°

- Math -
**Reiny**, Friday, July 15, 2011 at 5:28pmsin30° + cos225° + sin150° + cos330°

= sin30° + (-cos45°) + sin30° + cos30°

= 1/2 - 1/√2 + 1/2 + √3/2

= 1 - 1/√2 + √3/2

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