Basic operations on the TI-84 Plus

Trigonometric functions

  • Trigonometric function keys sin, cos, tan
  • Inverse trig function
    • Arcsine [2nd] [sin^-1]
    • Arccosine [2nd] [cos^-1]
    • Arctangent [2nd] [tan^-1]
  • Notice that angle mode (radian or degree) affects the value of the trigonometric function (picture)
  • Trigonometric functions do not work for complex numbers

 

Power [ ^ ], square [x^2], square root []

  • value [ ^ ] power
  • value^2
  • √(value)

 

Inverse

  • Inverse function [x^-1] corresponds to the reciprocal 1/x
  • value^-1

 

e

 

  • Exponential e
    • Accessed through [2nd][e^x]
    • e^(power) raises e to a given power
  • Constant e
    • Accessed through [2nd][e]

 

 

 

Negation

 

– (negation (-) returns the negative of a value

 

-(value)

 

Notice that negation (-) is different than the subtraction sign (–) picture

 

Notice the use of parentheses in negation picture

 

 

 

Log(, ln(, 10^(

 

  • Log( (logarithm [LOG])
  • Ln ( (natural log [LN])
  • 10^( (power of 10 [2nd][10^x]

 

Log(value)

Ln(value)

10^(power)

 

 

 

Pi

 

  • Pi is accessed through [2nd][pi]

 

 

 

MATH menu

 

To display the MATH menu press [MATH]. [MATH] opens four submenus, math (MATH), numbers (NUM), complex (CPX) and probability (PRB).

 

 

 

MATH operations

 

Frac : displays the answer as a fraction pic

 

Dec : displays the answer as a fraction pic

 

3 : calculates cube

 

3√ : calculates cube root

 

x√ : calculates xth root

 

FMin( : finds minimum of function

 

FMax( : finds maximum of function

 

NDeriv( : computes numerical derivative

 

FnInt( : computes the function integral

 

Summation :

 

LogBASE( :

 

Solver : displays the equation solver

 

Equation solver lets you solve for any variable in an equation and is valid for only real numbers. Make sure the equation is equal to zero as the calculator has to assume so.

 

In the solver menu insert an equation to eqn:0=

Enter values of known variables and edit values for upper and lower bounds. Default is bound =(-1E99,1E99)

Move cursor to the variable you want to solve and press [ALPHA][SOLVE]

 

 

 

 

MATH NUM (number) operations pics

 

Abs( : absolute value

 

Round( : round

 

IPart( : integer part

 

FPart( : fractional part

 

Int( : greatest integer

 

Min( : minimum value

 

Max( : maximum value

 

Lcm : least common multiple

 

Gcd : greatest common denominator
Entering and using complex numbers

 

Mode

Note that complex identities are always true in radian mode

 

 

Math CPX menu

 

 

Math PRB menu