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February 1, 2015

February 1, 2015

Posted by **Chris** on Wednesday, October 21, 2009 at 10:08pm.

Cot3X/CSCX=cosX(csc2X-1)

- trig -
**Reiny**, Wednesday, October 21, 2009 at 11:28pmtesting if x = 20º

LS = cot60/csc20

= sin20/tan60 = .1975

RS = cos20(1/sin40 - 1)

= .5222

Your equation is NOT an identity.

A check should always be your first step when proving complicated-looking trig "identities".

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