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Trigonometry
Functions & Powers
Constants
Memory
Calculation History
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Math Reference Values
| Angle | sin | cos | tan | Use |
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Toolinium๐งฎ Scientific Calculator
A fully advanced scientific calculator with all trigonometric functions, logarithms, exponents, memory registers, full history, and a built-in math reference table with common values โ all free, no login needed.
About Scientific Calculator
This Scientific Calculator brings a full-featured, keyboard-friendly calculator to your browser โ covering trigonometry, logarithms, powers, roots, memory registers and a built-in Programmer mode for binary, octal, decimal and hex conversions. A live math reference panel keeps common trig values, constants and identities one click away, so you spend less time hunting for formulas and more time solving problems.
Full Scientific
All trig, log, power and root functions with proper angle handling
Math Reference
Built-in trig table, constants, log values and identities
Memory Registers
MS, MR, M+, MC full memory function support
Full History
Every calculation saved โ click to reload any past result
How To Use
- Select angle mode (DEG / RAD / GRAD) before using trig functions
- Click a function like sin, then enter the value and closing bracket, then press =
- For tan(90ยฐ) โ the calculator correctly returns undefined (mathematically infinite)
- Use the Math Reference table on the right to look up common trig and log values
- Click any reference value to instantly insert it into the calculator
- Use MS/MR/M+/MC to store and recall values in memory
- Switch to Programmer mode for binary, octal, hex conversions and bitwise operations
- Full keyboard support โ type numbers, operators, Enter to calculate, Backspace to delete
Frequently Asked Questions
Why does tan(90) show undefined?
tan(90ยฐ) is mathematically undefined โ its value approaches positive infinity. This is the correct mathematical result. In RAD mode, tan(ฯ/2) similarly returns undefined. Our calculator correctly handles this instead of showing a large error number.
What is the difference between DEG, RAD and GRAD?
DEG (degrees) measures angles on a 0โ360 scale. RAD (radians) is the standard in mathematics โ a full circle is 2ฯ. GRAD divides a right angle into 100 units (full circle = 400 grad). Always select the correct mode before using sin, cos or tan.
How do I enter sin(30)?
Click the DEG button, then click sin, type 30, then press ) to close the bracket, then press =. The result will be 0.5.
What functions are supported?
sin, cos, tan, asin, acos, atan, atan2, sinh, cosh, tanh, logโโ, ln, logโ, โ, โ, abs, exp, factorial, ceil, floor, round, xโฟ, xยฒ, xยณ, mod/% and all constants ฯ, e, ฯ.
Can I use the keyboard?
Yes โ type numbers and operators directly. Press Enter or = to calculate. Backspace deletes last character. Escape clears everything.
What is Programmer mode?
Programmer mode converts numbers between binary, octal, decimal and hexadecimal. It also supports bitwise operations: AND, OR, XOR, NOT, shift left (SHL) and shift right (SHR).
Is this calculator free?
Yes โ completely free, no login or registration required. All calculations run locally in your browser with no data sent to any server.