Scientific Calculator
Fully-functional browser-based scientific calculator. Supports trig, logarithms, exponentials, factorials, and memory functions with DEG/RAD modes and full calculation history.
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Calculation History
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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°) is undefined
sin²θ + cos²θ
= 1
The Pythagorean identity
sin(2θ)
= 2·sin(θ)·cos(θ)
Double-angle formula
Radians
= degrees × π / 180
180° equals π radians
How to Use the Scientific Calculator
This browser-based scientific calculator handles arithmetic, trigonometric, logarithmic, and exponential functions entirely on your device — nothing is sent to a server. Use DEG mode when your angles are in degrees (the everyday default for most word problems), and switch to RAD mode when working in radians, as is standard in calculus and physics. The 2ND button unlocks the inverse and alternate versions of the SIN, COS, TAN, LOG, and LN keys — turning them into sin⁻¹, cos⁻¹, tan⁻¹, 10ˣ, and eˣ — so you can solve for an angle or exponent instead of a ratio or logarithm. Every calculation you run is saved to the history panel on the right; click any past entry to reload it back into the display.
— FAQ