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

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**niharika_kumar****Member**- From: Numeraland
- Registered: 2013-02-12
- Posts: 952

pls solve the following series.

friendship is tan 90°.

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**niharika_kumar****Member**- From: Numeraland
- Registered: 2013-02-12
- Posts: 952

both these options are given,what should I consider then?

friendship is tan 90°.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,458

Hi;

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

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**niharika_kumar****Member**- From: Numeraland
- Registered: 2013-02-12
- Posts: 952

thanx

friendship is tan 90°.

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