Math Tools
Scientific
Calculator
Fully-functional browser-based scientific calculator. Supports trig, logarithms, exponentials, factorials, and memory functions with DEG/RAD modes and full calculation history.
sin/cos/tanlog/lnx² √ xⁿDEG/RADMemoryHistory
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📚 Formula & Constants Reference
sin(0°)
= 0
sin(30°)=0.5, sin(90°)=1
cos(0°)
= 1
cos(60°)=0.5, cos(90°)=0
tan(45°)
= 1
tan(0°)=0, tan(90°)=undefined
sin²θ + cos²θ
= 1
Pythagorean identity
sin(2θ)
= 2·sin(θ)·cos(θ)
Double angle formula
Radians
= degrees × π/180
180° = π radians
log(10)
= 1
Common log base 10
ln(e)
= 1
Natural log base e
log(a·b)
= log(a) + log(b)
Product rule
log(aⁿ)
= n·log(a)
Power rule
log_b(x)
= ln(x)/ln(b)
Change of base formula
e^ln(x)
= x
Inverse relationship
π (Pi)
3.14159265358979
Ratio of circumference to diameter
e (Euler)
2.71828182845905
Base of natural logarithm
φ (Golden Ratio)
1.61803398874989
(1+√5)/2
√2
1.41421356237310
Pythagorean constant
√3
1.73205080756888
Theodorus constant
ln(2)
0.69314718055995
Natural log of 2
Euler's Identity
e^(iπ) + 1 = 0
Most beautiful equation
Quadratic Formula
x = (−b ± √(b²−4ac)) / 2a
Roots of ax²+bx+c=0
Binomial
(a+b)² = a²+2ab+b²
Expansion formula
Difference of Squares
a²−b² = (a+b)(a−b)
Factoring identity
n! (Factorial)
n! = n×(n−1)×…×1
5! = 120
Pythagorean
a² + b² = c²
Right triangle sides
How to Use the Scientific Calculator
This browser-based scientific calculator handles arithmetic, trigonometric, logarithmic, and exponential functions. Use the DEG mode for degrees (common in everyday problems) and RAD mode for radians (used in calculus and physics). The 2nd button activates inverse functions (sin⁻¹, cos⁻¹, tan⁻¹, 10^x, e^x).
Frequently Asked Questions
How do I enter negative numbers?
Use the ± (plus/minus) button after entering a number to make it negative. For example, to calculate sin(−30°): press 3, 0, ±, then sin.
What does the 2nd button do?
Pressing 2nd activates the inverse/alternate functions: sin becomes sin⁻¹ (arcsin), cos becomes cos⁻¹ (arccos), tan becomes tan⁻¹ (arctan). These return the angle when given a ratio. In 2nd mode, log becomes 10^x and ln becomes e^x.
How do I calculate a power like 2 to the 10th?
Enter 2, press xⁿ (the power operator), enter 10, then press =. The calculator will compute 2^10 = 1024. You can also use this for any base and exponent.
What is the % button for?
The % button divides the current number by 100. For example, 50% = 0.5. When used in an expression like 200 + 15%, it calculates 15% of 200 and adds it: 200 + 30 = 230.
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