Trig, logs, powers, and roots — one keypad.

Does this handle order of operations like a full expression?

This works like a standard handheld scientific calculator: each operation executes immediately rather than parsing a full typed expression, so functions like sin, log, or x² apply to the number currently on screen. This matches how physical scientific calculators behave.

What does the DEG/RAD toggle do?

It controls whether sin, cos, and tan treat the entered number as degrees or radians. Switch it before using a trig function, not after.

What do MC, MR, M+, and M- do?

Standard calculator memory: M+ adds the current display value to memory, M- subtracts it, MR recalls the stored value to the display, and MC clears memory back to zero.

Does this follow order of operations (PEMDAS) like a written expression?

No — like a real handheld calculator, this executes operations immediately as you press each key, rather than parsing a full typed expression. For a calculation with multiple operations, work through it step by step in the order you'd solve it by hand, the same way you would on a physical calculator.

What's the difference between DEG and RAD mode?

Degrees (DEG) measures angles the everyday way, 0–360° per full circle. Radians (RAD) measures angles as a fraction of π, used throughout higher mathematics and physics — sin(90°) in degree mode and sin(π/2) in radian mode give the same result, but entering '90' in the wrong mode will give a completely different answer.

Worked example: to compute 3² + √16, press 3, x², then 16, √, then +, then = — matching how you'd solve it left to right on a physical scientific calculator.