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January 30, 2015

January 30, 2015

Posted by **Adam** on Tuesday, March 2, 2010 at 11:37pm.

cos squared B- sin squared B= 2cos squared B -1

- calculus -
**Reiny**, Tuesday, March 2, 2010 at 11:40pmcos^2 B - sin^2 B = 2cos^ B - 1

LS

= cos^2 B - (1 - cos^2 B)

= 2cos^2 B - 1

= RS

- calculus -
**drwls**, Tuesday, March 2, 2010 at 11:41pmsubstitute 1 - cos^2B for sin^2 B

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