Scientific Calculator – Plain English Description

This is a web-based scientific calculator built with HTML, CSS, and JavaScript that functions similarly to a physical scientific calculator. You can interact with it by clicking the buttons with your mouse or by typing on your keyboard.

Key Features

Basic Operations

• Arithmetic functions: Addition (+), Subtraction (–), Multiplication (×), Division (÷)
• Number input: Digits 0-9 and decimal point (.)
• Clear functions: All Clear (AC) and Backspace (Back)

Scientific Functions

• Trigonometric functions: Sine (sin), Cosine (cos), Tangent (tan) and their inverses (sin⁻¹, cos⁻¹, tan⁻¹)
• Logarithmic functions: Natural logarithm (ln) and base-10 logarithm (log)
• Exponential functions: eˣ and 10ˣ
• Power functions: x², x³, xʸ (x to the power of y)
• Root functions: Square root (√x), Cube root (³√x), and yth root (ʸ√x)
• Constants: π (pi) and e (Euler’s number)
• Other functions: Factorial (!), Percentage (%), Reciprocal (1/x)

Memory Functions

• Memory Store/Recall: M+ (add to memory), M- (subtract from memory), MR (memory recall), MC (memory clear)
• Answer recall: Ans (recalls the last computed result)

Additional Features

• Sign change: ± (plus/minus button toggles between positive and negative)
• Random number: RND (generates a random number between 0 and 1)
• Exponent entry: EXP (for entering numbers in scientific notation)
• Parentheses: ( and ) for controlling calculation order
• Angle mode: Toggle between degrees (DEG) and radians (RAD) for trigonometric functions

User Interface

The calculator has a clean, dark-themed design with color-coded buttons:

• Number buttons are white text on dark gray
• Operation buttons are teal
• Function buttons are red
• Memory buttons are orange
• Equals button is teal with dark background
• Clear button is red

The display shows both your current entry and previous operations, making it easy to track your calculations.

How to Use

1. Basic calculations: Enter numbers and operators just like on a physical calculator
2. Scientific functions: Click the function button before or after entering your number
3. Keyboard support: You can type numbers and operators directly from your keyboard
4. Angle mode: Switch between degrees and radians using the DEG/RAD toggle
5. Reset: Use the RESET button to completely clear all calculator memory and settings

This calculator is designed to handle complex scientific, engineering, and mathematical calculations with precision, while maintaining an intuitive interface similar to physical scientific calculators.