Question 1

How do I use trigonometric functions on a scientific calculator?

Accepted Answer

Enter a number, then click sin, cos, or tan. Results depend on angle mode (DEG for degrees, RAD for radians). Example: 90 DEG + sin = 1. For inverse functions (asin, acos, atan), the result is the angle. Use DEG mode for everyday calculations.

Question 2

What is the difference between log and ln?

Accepted Answer

log is base-10 logarithm (log₁₀). ln is natural logarithm (logₑ, base e≈2.718). Example: log(100) = 2, ln(e) = 1. Use log for common calculations, ln for calculus and exponential functions. Both are available on this calculator.

Question 3

How do I calculate powers and roots?

Accepted Answer

For square: enter number, click x². For cube: click x³. For custom power: enter base, click xʸ (or ^), enter exponent. For square root: click √. For nth root: use xʸ with 1/n as exponent. Example: 8 ^ (1/3) = 2 (cube root of 8).

Question 4

What is factorial and how do I use it?

Accepted Answer

Factorial (n!) is product of all positive integers up to n. Example: 5! = 5×4×3×2×1 = 120. Used in permutations, combinations, and probability. Enter number, click n!. Maximum practical input is about 170 (171! exceeds floating point).

Question 5

How do memory functions work?

Accepted Answer

M+ adds current value to memory. M- subtracts from memory. MR recalls memory value. MC clears memory. Memory persists across calculations. Useful for storing intermediate results in multi-step calculations.

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