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January 31, 2015

January 31, 2015

Posted by **ken** on Tuesday, February 12, 2013 at 9:04am.

tanx=cscx-cotx

- math -
**Reiny**, Tuesday, February 12, 2013 at 9:37amRS = 1/sinx - cosx/sinx

= (1- cosx)/sinx

≠ tanx

this is not an identity,

let x = 45°

tan45 = 1

csc45 - cot45 = √2 - 1 ≠ 1

all we needde was one counterexample to show it to be false.

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