This is a simple calculator application built using HTML and CSS. It performs basic arithmetic operations and includes trigonometric functions and square root calculation.

• Addition, subtraction, multiplication, and division operations.
• Trigonometric functions: sin, cos, tan.
• Square root calculation.
• Backspace functionality to delete the last entered digit.
• Responsive design for various screen sizes.

1. Open index.html in your web browser.

2. Use the calculator by clicking on the buttons or typing directly into the input field.

• Enter numbers using the provided buttons or your keyboard.
• Use the operation buttons (+, -, *, /) to perform arithmetic operations.
• Click on "sin", "cos", or "tan" buttons to calculate trigonometric functions.
• Click on "√" to calculate the square root of a number.
• Use the backspace button (←) to delete the last entered digit.
• Click on "c" to clear the input field.
• Click on "=" to evaluate the expression.

You can view a live demo of the calculator here.

• Font Awesome - for icons.