HP20b - Dedicated Math Key

Shifted Function Mathematical Operations

• [Shift][EEX] Keys in numbers with explicit powers of 10.
• [Shift][SIN] Calculates sine. 
• [Shift][COS] Calculates cosine. 
• [Shift][TAN] Calculates tangent.
• [Shift][LN] Natural log. 
• [Shift][ex] Calculates natural exponent to the power of x. 
• [Shift][x2] Returns square of x. 
• [Shift][sqrt] Calculates square root.
• [Shift][RAND] Executes the Random function. Returns a random number in the range 0 < x <1. 
• [Shift][ ! ] Calculates factorial of x(where 0 ≤ x≤ 253). 
• [Shift][yx] Returns y to the xpower. 
• [Shift][1/x] Reciprocal. 
• [Shift][RND] Rounds x internally to the number specified by the display format. Default is two digits to the right of the decimal point.
• More functions: [Math] key.