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

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## #1 2008-02-27 03:23:43

tony123
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### acute angle

find acute angle x such that

Last edited by tony123 (2008-02-27 03:25:20)

## #2 2008-02-28 07:13:53

JaneFairfax
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### Re: acute angle

Last edited by JaneFairfax (2008-02-28 07:21:44)

Q: Who wrote the novels Mrs Dalloway and To the Lighthouse?

## #3 2008-02-28 07:27:05

JaneFairfax
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### Re: acute angle

Well, I didn’t find the solution the following way – but now that I’ve found the solution, it finally hit me that I could have done it the following way instead of the messy method I used.

The roots of the complex equation

are

The sum of the roots is equal to 0. QED.

Q: Who wrote the novels Mrs Dalloway and To the Lighthouse?

## #4 2008-02-28 07:50:47

tony123
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### Re: acute angle

yes jane the only solution  x=2pi/7

x  acute

but you can get the solution by multiplying by 2sinx/2

thank you

## #5 2011-07-29 15:21:58

gAr
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### Re: acute angle

Hi tony123,

The way you wanted:

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."