Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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## Topic review (newest first)

bobbym
2012-12-02 07:17:35

Hi;

Okay, good luck then and welcome to the forum.

unlucky guy
2012-12-02 02:11:51

no he isn't im sure

bobbym
2012-12-02 00:06:34

Hi;

Please let me know what your evil teacher thinks of it. He sounds like a moderator I know on another forum. If they are the same, he will absolutely hate my answer...

unlucky guy
2012-12-02 00:02:59

thanks

bobbym
2012-12-01 23:42:43

Hi unlucky guy;

One of the easiest ways is to find an obvious counterexample:

so sec(0)  is 1 / 1 because cos(0) is 1.

because

unlucky guy
2012-12-01 23:19:33

my teacher is evil and won't explain everything. he wants brides and stuff like that... he gave only one easy example about trigonometric function and gave 48 exercises as a homework including problems.

please can u help me with this one...

prove that sin t + sec t = tan t is not an identity.                and please with little bit more explanation about how you solving