Brother 715SR
| Manufacturer: | Brother Industries Ltd. (Japan) |
| Mfg. date: | 1977 |
| Size: | 9,3×15,8×2,7 cm |
| Weight (ready for operate): | 262 g |
| Type: | scientific |
| Capacity: | 8/8+2 digits (input/display) 8/8+2 digits (internal precision) |
| Operating logic: | algebraic |
| CPU: | NEC uPD952C |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 2 bracket (with saving the pending operation) 1 memory (with aritmetic) |
| Features: | +/-change sign (direct entry of negative numbers) RVexchange registers (X-Y) Ffloating-point notation Sciscientific (exponential) notation Sqrsquare root x2square pivalue of pi (3.1415..) can be recalled 1/xreciprocal trigtrigonometrical functions (sin, cos, tan and inverses: arcsin, arccos, arctan) hyphyperbolic functions (sinh, cosh, tanh and inverses: ar sinh, ar cosh, ar tanh) DMS-DDconversion of decimal and sexagesimal numbers logexponential and logarithmical functions (10- and e-base) yxraising to power SDone variable statistics: calculating mean and standard deviation n!factorial |
| Display: | 8+2+2 digit VFD (Itron FG125A2) |
| Power: | 4×AA-type battery 6V adaptor |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 61.893424 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.011699E-70 |
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