HP 35s HP 35s scientific calculator - User Guide - Page 84

Conversion Functions The HP 35s supports four types of conversions. You can convert between: rectangular and polar formats for complex numbers degrees, radians, and gradients for angle measures decimal and hexagesimal formats for time (and degree angles) various supported units (cm/in, kg/lb, etc) With the exception of the rectangular and polar conversions, each of the conversions is associated with a particular key. The left (yellow) shift of the key converts one way while the right (blue) shift of the same key converts the other way. For each conversion of this type, the number you entered is assumed to be measured using the other unit. For example, when using ¾ to convert a number to Fahrenheit degrees, the number you enter is assumed to be a temperature measured in Celsius degrees. The examples in this chapter utilize RPN mode. In ALG mode, enter the function first, then the number to convert. Rectangular/Polar Conversions Polar coordinates (r,θ) and rectangular coordinates (x,y) are measured as shown in the illustration. The angle θ uses units set by the current angular mode. A calculated result for θ will be between -180° and 180°, between -π and π radians, or between -200 and 200 grads. 4-10 Real-Number Functions