다기능 전자계산기 ‪!‬ 4+

긴 수식을 입력 할 때, 매우 쉽게 수정할 수 있습니다 !
수첩에 문자 쓰듯이 !
복소수 계산, 통계 계산, 과학 함수 계산,지수 계산, 적분 계산,확률 계산 !

• It Supports the File Management !
파일 관리를 지원합니다
- Create a file
- Save
- Open
- Delete

• Mathematical Functions:
수학 함수

SIN(X) : sine of x
COS(X) : cosine of x
TAN(X) : tangent of x
COT(X) : cotangent of x
ASIN(X) : arcsine of x
ACOS(X) : arccosine of x
ATAN(X) : arctangent of x
SINH(X) : hyperbolic sine
COSH(X) : hyperbolic cosine
TANH(X) : hyperbolic tangent
ASINH(X) : inverse hyperbolic sine
ACOSH(X) : inverse hyperbolic cosine
ATANH(X) : inverse hyperbolic tangent
SQRT(X) : square root of x
ABS(X) : absolute value of x
FCT(X) : x factorial
LOG(X,Y) : logarithm of y to base x
LN(X) : natural logarithm of x
LOG(X) : base-10 logarithm of x
LOG10(X) : base-10 logarithm of x
LOG2(X) : base-2 logarithm of x
EXP(X) : base-e exponential of x
ERF(X) : the error function of x
ERFC(X) : the complementary error function of x
ROUND(X) : integral nearest to x
CEIL(X) : the smallest integral that is not less than x
FLOOR(X) : the largest integral that is not greater than x
TGAMMA(X) : the gamma function of x
LGAMMA(X) : the natural logarithm of the absolute value of the gamma function of x
X^Y : y-th power of x

• Statistical functions:
통계 함수

SUM(a1,a2,a3,a4) : a1+a2+a3+a4
합계
AVERAGE(a1,a2,a3,a4) : (a1+a2+a3+a4)÷4
평균
VARIANCE(a1,a2,a3,a4) : variance
평방 편차
SD(...) : standard deviation
표준 편차
SUMSQ(...) : sum of squares
제곱의 합
AD(...) : absolute deviation
절대 편차
CV(...) : coefficient of variation
변동 계수
SVARIANCE(...) : sample variance
표본 분산
SSD(...) : sample standard deviation
표본 표준 편차
SCV(...) : sample coefficient of variance
표본 분산 계수

• Help Manual:
매뉴얼

“//” means a line comment or annotation.
"//"는 주석을 의미합니다.

A=2
B=3
C=A+B

Click “Run”, the screen shows:

C=5

If the line C=A+B is annotated ,

A=2
B=3
//C=A+B

Click “Run”, the screen shows:

B=3

- Variable Naming Rules:
변수 이름 지정 규칙 :
Start with letters, and not involving keywords.
A, A1, B25, HAT (right)
PRINT1, COS (wrong)

- The Usage of PRINT:
PRINT의 사용법 :

A=10+5
B=10/5
PRITN A,B

Click “Run”, the screen shows:

A=15
B=2

Default variable name is RESULT , e.g.

16+5*6

Click “Run”, the screen shows:

RESULT=46

- Combination & Arrangement:
조합 및 배열

C(n,k) = n!/(k!(n-k)!)
A(n,k) = n!/(n-k)!

- Complex Number
복소수 계산

화면에 "i"또는 "∠"이 있으면 복소수 계산 모드로 자동 전환됩니다.

e.g. X=3+4i or X=5∠53.1°

9 functions are available for the Mode.
모드에서는 9 가지 기능을 사용할 수 있습니다.

SIN(X), COS(X), TAN(X)
COT(X), SINH(X), COSH(X)
SQRT(X), ABS(X), CONJUGATE(X)

- Integral
적분

INTEGRAL X²,2,4

Default precision is 300 times of calculations. It can be more accurate, e.g. 500 times.

INTEGRAL X²,2,4,500

- Graphics
그래픽

PLOT SIN(X)
PLOT X²

Default length = 10, width = 10. Specify the lenght = 20, width = 5. Then we have,

PLOT X²,20,5

Default dense is 150 points. It also can be customized, e.g. 200 points.

PLOT X²,20,5,200