HP 48gII 30S, 45T, S30`, T45`, 135U, U135`, 0.25„¼, 0.85„¾, 1.35„À, „¼0.25`, „¾0.85`, „À1.35`, 2.45`‚¹ 2.3\`„¸

2.45`‚¹ 2.3\`„¸

•Three trigonometric functions are readily available in the keyboard: sine (S), cosine (T), and tangent (U). Arguments of these functions are angles in either degrees, radians, grades. The following examples use angles in degrees (DEG):

In ALG mode:

S30`T45`U135`

In RPN mode:

30S45T135U

•The inverse trigonometric functions available in the keyboard are the arcsine („¼), arccosine („¾), and arctangent („À). The answer from these functions will be given in the selected angular measure (DEG, RAD, GRD). Some examples are shown next:

In ALG mode:

„¼0.25`„¾0.85`„À1.35`

In RPN mode:

0.25„¼0.85„¾1.35„À

All the functions described above, namely, ABS, ABS, SQ, √, ^, XROOT, LOG, ALOG, LN, EXP, SIN, COS, TAN, ASIN, ACOS, ATAN, can be combined with the fundamental operations (+-*/) to form more complex expressions. The Equation Writer, whose operations is described in Chapter 2, is ideal for building such expressions, regardless of the calculator operation mode.

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