Scientific Calculator
Use this like any handheld scientific calculator — tap or type digits and operators to build an expression, use the function keys for sin, cos, tan, log, ln, and square root, and press = to evaluate. Press 2nd to reach inverse trig (sin⁻¹, cos⁻¹, tan⁻¹), 10ˣ, eˣ, cube, cube root, and factorial. Parentheses, exponents, and memory (MC/MR/M+/M−) are all supported, and every keypress works from your keyboard too.
How the Scientific formula works
This calculator evaluates expressions using standard mathematical order of operations (PEMDAS): parentheses first, then exponents, then multiplication and division left to right, then addition and subtraction left to right.
Example: 2 + 3 × 4 = 2 + 12 = 14, not (2+3) × 4 = 20 sin, cos, and tan (and their inverses) use the Degree/Radian mode shown on the display — toggle it with the DEG/RAD key Press 2nd once before a function key to use its inverse/secondary function — it automatically switches back after use
Step-by-step calculation
- Tap number and operator keys to build your expression, just like a physical calculator — the full expression shows on the display as you type.
- Use function keys (sin, cos, tan, log, ln, √) to insert that function — they automatically open a parenthesis for you to enter the argument.
- Tap 2nd before a function key to reach its inverse or secondary function: sin⁻¹, cos⁻¹, tan⁻¹, 10ˣ, eˣ, x³, ∛, and x! (factorial).
- Use ( and ) to group parts of an expression, and ^ for exponents.
- Use MC, MR, M+, and M− to clear, recall, add to, or subtract from calculator memory — an 'M' badge appears on the display whenever memory holds a nonzero value.
- Press = to evaluate. Press AC to clear everything, or ⌫ to delete the last entry.
- Toggle DEG/RAD to switch how sin, cos, tan, and their inverses interpret angles.
Worked example
Entering sin(30) with DEG mode on and pressing = gives 0.5, since 30° is a standard trig angle. Pressing 2nd then sin turns it into sin⁻¹, so entering sin⁻¹(0.5) gives 30 back. Entering 5, then 2nd, then 1/x (which becomes x!) gives 120, since 5! = 5×4×3×2×1. Entering (5+3)×2 gives 16, correctly grouping the addition before multiplying.
Frequently asked questions
Does this calculator follow order of operations?
Yes — multiplication and division are evaluated before addition and subtraction, and parentheses and exponents take priority over both, exactly like a physical scientific calculator or standard mathematical convention.
Can I use my keyboard instead of clicking?
Yes — number keys, +, -, *, /, ^, parentheses, !, Enter (for =), Backspace, and Escape (for AC) all work directly from your keyboard.
What's the difference between the DEG and RAD modes?
It changes how sin, cos, tan, and their inverse functions interpret angles — DEG mode expects and returns degrees (like 90 for a right angle), while RAD mode expects and returns radians (like π/2 for a right angle). Most everyday and classroom use is in DEG mode.
How do I access sin⁻¹, cos⁻¹, tan⁻¹, 10ˣ, eˣ, x³, ∛, and factorial?
Tap the 2nd key once, then tap the related primary key: sin becomes sin⁻¹, cos becomes cos⁻¹, tan becomes tan⁻¹, log becomes 10ˣ, ln becomes eˣ, x² becomes x³, √ becomes ∛, and 1/x becomes x! (factorial). The calculator automatically switches back to the primary functions after one use, just like a physical scientific calculator's shift key.
How does the memory (MC/MR/M+/M−) work?
M+ adds the currently displayed or entered value to memory, M− subtracts it, MR recalls the stored memory value into your expression, and MC clears memory back to zero. A small 'M' badge appears on the display whenever memory holds a nonzero value, so you always know it's in use.
Why do sin, cos, tan, log, ln, and √ automatically add a parenthesis?
Those are function keys, not operators — they need an argument to operate on, so the calculator opens the parenthesis for you and waits for you to type or tap the value to evaluate, then close it with ).