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| why is sinh 2x = sinh u • cosh u ?? | 1 | flooglewarp | | | | |
| Is this proof valid | 1 | Fun_Reputation5776 | | | | |
| I dont understand how they got to this step? | 1 | flooglewarp | | | | |
| Help me solve a combinatorics problem please | 1 | aug16Tired | | | | |
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