Skip to content
Free Delivery on All Orders
Free Delivery on All Orders

CASIO FX991EX Advanced Scientific Calculator

  • The calculator has a large display that shows up to 16 digits.
  • It supports fraction calculations and decimal conversions.
  • It has a multi-replay function that allows you to step back through calculations.
  • It has a built-in table function for generating tables of values.
  • It supports matrix calculations and vector calculations.
  • It has a solve function for solving equations numerically.
  • Trigonometric Functions: The calculator supports trigonometric functions such as sine, cosine, tangent, etc. To access these functions, press the corresponding trigonometric button (e.g., "sin," "cos," "tan") followed by the value you want to calculate. Example: Press "sin 45" to calculate the sine of 45 degrees.
    • Exponents and Roots: Use the "^" key to raise a number to a power. For example, to calculate 2 raised to the power of 3, press "2 ^ 3". Use the "√" key to calculate square roots. For example, to find the square root of 9, press "√9".
    • Logarithmic Functions: To calculate logarithms, use the "log" key. For example, to calculate the logarithm of 100 with base 10, press "log 100".
    • Exponential Functions: Use the "EXP" key to perform exponential calculations. For example, to calculate e raised to the power of 2, press "EXP 2".
    • Complex Numbers: The calculator supports calculations involving complex numbers. Use the "a+bi" key to enter complex numbers in the form "a+bi", where "a" and "b" are real numbers. Example: To calculate the sum of 3+2i and 1+4i, press "(3+2i) + (1+4i)".
    • Statistics: The calculator has built-in statistical functions such as mean, standard deviation, regression analysis, etc. To access these functions, press the "MODE" button and select the statistical mode. Then enter the data values and perform the desired statistical calculation.
    • Equation Solver: The calculator can solve linear equations and quadratic equations. To access the equation solver, press the "MODE" button and select the equation solver mode. Enter the coefficients of the equation and solve for the unknown variable.
    • Memory Functions: The calculator has several memory functions, including "M+" (add to memory), "M-" (subtract from memory), "MR" (recall from memory), and "MC" (clear memory).

Net Orders Checkout

Item Price Qty Total
Subtotal £0.00

Shipping Address

Shipping Methods