Scientific Calculator
A scientific calculator for trigonometry, logarithms, powers, roots, and factorials. Degrees are selected when the page opens. Switch back to the standard calculator for plain arithmetic, or change the angle to radians or gradians.
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Formula
The result updates while you build the expression. Press a function and it wraps the current value: 30, then sin, becomes sin(30). To write 2 + sin(30), press 2, then +, then sin, then 30, then ). Parentheses, powers, multiplication, and addition run in that order. 2^3^2 is 2 raised to 9, which is 512, because the power on the right is calculated first.
Deg, Rad, and Grad change sine, cosine, tangent, and their inverses. They do not change the hyperbolic functions. In degrees, sin(30) is 0.5. In radians, sin(π/2) is 1. In gradians, a right angle is 100, so sin(100) is 1. The 2nd key uses the small label on the next function key, such as sin⁻¹, √, ∛, ʸ√x, 10ˣ, or eˣ, and then turns off.
x², x³, and xʸ append a power. 1/x appends a power of −1. n! is the factorial of a whole number from 0 to 170, and 0! is 1. log is base 10 and ln is natural log. π inserts pi, and e inserts the base of the natural log. EXP writes scientific notation, so 1.5 EXP 2 is 150. mod is the remainder: 10 mod 3 is 1.
The y-th root is root(value, n). root(8, 3) is 2. Press ʸ√x, which is the 2nd function of xʸ, then enter the root with the comma key if you are starting from a blank expression. Absolute value is the 2nd function of n!. Memory, percent, Ans, and the sign key work the same way as on the standard calculator. The page does not store the expression.
sin, cos, tan, then powers and roots, then × and ÷, then + and −. n! = 1 × 2 × … × n.
- sin cos tan Sine, cosine, and tangent in the selected angle unit. 2nd switches to the inverse.
- log ln Base-10 log and natural log. 2nd switches to 10ˣ and eˣ.
- xʸ √ A power, a square root, a cube root, or root(value, n) for the n-th root.
- n! Factorial of a whole number from 0 to 170.
Worked example
In degree mode, enter sin(30). Thirty degrees is half of a right angle, so the sine is 0.5. The same function in radians needs the angle in radians: sin(π/2) is 1.
Enter log(1000). One thousand is 10 × 10 × 10, so the base-10 log is 3. Enter 5! and the factorial is 120, because 5 × 4 × 3 × 2 × 1 is 120.
FAQ
How do I open the scientific calculator?
Use the Scientific switch on the calculator. Standard and Scientific are separate pages, so you can share or bookmark either one. The switch keeps the same keypad layout and adds the scientific keys.
Does sine use degrees or radians?
Degrees, until you press Rad or Grad. sin(30) is 0.5 in degrees. In radians, use π, so sin(π/2) is 1. A right angle in gradians is 100. Hyperbolic functions ignore the angle setting.
What does the 2nd key do?
It selects the small label above the next function key, such as sin⁻¹, √, or 10ˣ. The key turns off after that function. Press 2nd again if you want the ordinary function instead.
Why was my factorial rejected?
Factorial here accepts whole numbers from 0 through 170. A decimal, a negative number, or a larger whole number has no result on this page. 0! is 1.