Question 1

What is the difference between DEG and RAD mode?

Accepted Answer

DEG (degree) mode measures angles in degrees (0–360). RAD (radian) mode measures angles in radians (0–2π). Most real-world problems use degrees; scientific and engineering calculations often use radians.

Question 2

What does the % key do?

Accepted Answer

The % key converts a number to a percentage. For example, 50% = 0.5. In an expression like 200 + 15%, it adds 15% of 200 (30), giving 230.

Question 3

What is the EXP key?

Accepted Answer

EXP (scientific notation) multiplies the current value by a power of 10. For example, 1.5 EXP 3 = 1.5 × 10³ = 1500.

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