Matlab Basics: Understanding Trigonometric Functions

1.Calculating Trigonometric Functions

Sine and arcsine functions, cosine and arccosine functions, tangent and cotangent, conversion between radians and degrees, calculating the length of the hypotenuse, etc.

2.Understanding Functions

Sine Functionsin

Cosine Functioncos

Tangent Functiontan

Cotangent Functioncot

Sine Function with Degrees as Parametersind

Arcsine Functionasin

Switching Between Degrees and Radiansdeg2rad

3.Programming Example

Program:

pi %Pi

ans1=sin(pi/6)

ans2=asin(0.5)

ans3=sind(30)

ans4=asind(0.5)

ans5=cos(pi/3)

Results:

ans =

3.1416

ans1 =

0.5000

ans2 =

0.5236

ans3 =

0.5000

ans4 =

30.0000

ans5 =

0.5000

ans6=acos(0.5)

ans7=cosd(60)

ans8=acosd(0.5)

ans9=tan(pi/4)

ans10=cot(pi/4)

ans11=deg2rad(180)

ans12=rad2deg(pi) %Convert Radians to Degrees

ans13=hypot(3,4) %Calculate the Length of the Hypotenuse

Results:

ans6 =

1.0472

ans7 =

0.5000

ans8 =

60.0000

ans9 =

1.0000

ans10 =

1.0000

ans11 =

3.1416

ans12 =

180

ans13 =

5

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