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name: calculator description: | Accurate mathematical calculations. Use when user needs to compute: (1) Basic arithmetic (+, -, *, /), (2) Powers and roots (^, sqrt), (3) Percentages, (4) Trigonometry (sin, cos, tan), (5) Logarithms (log, ln), (6) Complex expressions, (7) Unit conversions.

Calculator Skill

Perform accurate mathematical calculations using the calc.py script.

Usage

Run calculations directly with Python:

python3 <skill-path>/scripts/calc.py "<expression>"

Supported Operations

Basic Arithmetic

• + Addition: 2 + 3 → 5
• - Subtraction: 10 - 4 → 6
• * Multiplication: 6 * 7 → 42
• / Division: 15 / 3 → 5

Powers & Roots

• ^ or ** Power: 2^10 → 1024
• sqrt() Square root: sqrt(16) → 4

Percentages

• 100 * 15% → 15 (15% of 100)
• 50 + 50 * 10% → 55 (add 10%)

Trigonometry (radians)

• sin(pi/2) → 1
• cos(pi) → -1
• tan(pi/4) → 1

Logarithms

• log(100) → 2 (base 10)
• ln(e) → 1 (natural log)

Constants

• pi → 3.141592653589793
• e → 2.718281828459045

Other Functions

• abs(-5) → 5
• round(3.7) → 4
• floor(3.9) → 3
• ceil(3.1) → 4
• pow(2, 8) → 256

Examples

python3 scripts/calc.py "2 + 3 * 4"        # 14
python3 scripts/calc.py "(2 + 3) * 4"       # 20
python3 scripts/calc.py "sqrt(144)"         # 12
python3 scripts/calc.py "2^8"               # 256
python3 scripts/calc.py "1000 * 5%"         # 50
python3 scripts/calc.py "sin(0)"            # 0
python3 scripts/calc.py "log(1000)"         # 3

Notes

• Implicit multiplication supported: 2(3) = 2*3
• Use parentheses for grouping
• Float results are rounded to 10 decimal places to avoid precision issues