Scientific calculator
A full scientific calculator that works like the one in your exam: sine, cosine and tangent in degrees or radians, powers, roots, logs, factorials and combinations, with answers as decimals, fractions or standard form. Tap the keys or type straight in.
You can also type: Enter gives the answer. nCr takes two numbers: nCr(5,2).
History
Your last 20 calculations appear here. Tap one to use it again.
It follows the same rules as your exam calculator
Brackets come first, then powers, then multiplication and division, then addition and subtraction (BIDMAS). You can leave out the multiplication sign as you would on paper: 2π, 3(4 + 1) and 2sin(30) all work, and a missing closing bracket at the end is added for you.
Errors are explained in plain words instead of just 'Math ERROR': tan(90°) is undefined, you can't divide by zero, and you can't take the square root of a negative number.
Useful key presses
- ✓ sin⁻¹, cos⁻¹ and tan⁻¹ find an angle from a ratio: tan⁻¹(1) = 45°
- ✓ nCr(5,2) counts combinations (choosing 2 from 5 gives 10)
- ✓ x! is the factorial: 5! = 120
- ✓ Ans reuses your last answer, so a chain of calculations doesn't need retyping
- ✓ % divides by 100: 15%×80 = 12
FAQs
How do I switch between degrees and radians?＋
Press the DEG / RAD key at the top left. GCSE trigonometry uses degrees; A-Level and IB calculus usually use radians.
How do I get an answer as a fraction?＋
Press S⇔D after an answer. It switches between the decimal, the fraction (and mixed number) and standard form, like the S⇔D key on a Casio.
How do I type standard form, like 6.02 × 10²³?＋
Type 6.02, press ×10ˣ, then 23, and =. Very large and very small answers are shown in standard form automatically.
Why does −2² give −4?＋
Powers are worked out before the minus sign, the same as on exam calculators. For (−2)² = 4, use brackets.
Can I use this in an exam?＋
No: exams need an approved physical calculator. Use this one for homework and practice, and learn the same key presses on your own calculator.
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