HP 35s HP 35s scientific calculator - User Guide - Page 288
Environmental Limits
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A: Exponent of ten; that is, 2.51 × 10-13. Q: The calculator has displayed the message What should I do? A: You must clear a portion of memory before proceeding. (See appendix B.) Q: Why does calculating the sine (or tangent) of π radians display a very small number instead of 0? A: π cannot be represented exactly with the 12-digit precision of the calculator. Q: Why do I get incorrect answers when I use the trigonometric functions? A: You must make sure the calculator is using the correct angular mode (9 or Q: What does an annunciator in the display mean? A: It indicates something about the status of the calculator. See "Annunciators" in chapter 1. Q: Numbers show up as fractions. How do I get decimal numbers? A: Press . Environmental Limits To maintain product reliability, observe the following temperature and humidity limits: Operating temperature: 0 to 45 °C (32 to 113 °F). Storage temperature: -20 to 65 °C (-4 to 149 °F). Operating and storage humidity: 90% relative humidity at 40 °C (104 °F) maximum. A-2 Support, Batteries, and Service