Calculating sin and cos functions
472 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Mohsin Shah
el 29 de Mayo de 2011
Comentada: Steven Lord
el 29 de Jun. de 2022
Hello, i calculated the value of sin(45) in Matlab, the result was sin(45)=0.8509 and for cosin i got cos(45)= 0.5253. From general mathematics we know that sin(45)=cos(45) then why Matlab is giving different results??
0 comentarios
Respuesta aceptada
Paulo Silva
el 29 de Mayo de 2011
Those functions work in radians not degrees, try this
cosd(45)
sind(45)
3 comentarios
Walter Roberson
el 18 de Dic. de 2021
It is not clear to me why sin() of a scalar should result in a vector of length 4 ? Or why those particular values should be output ?
Más respuestas (5)
bym
el 29 de Mayo de 2011
sin() & cos() arguments are in radians. If you want degrees use
sind() cosd()
3 comentarios
Steven Lord
el 20 de Abr. de 2020
If you're going to convert degrees to radians or vice versa, use the deg2rad or rad2deg functions moved from Mapping Toolbox to MATLAB in release R2015b rather than the "magic number" of pi/180.
krishna sutradhar
el 23 de Jun. de 2021
Editada: Walter Roberson
el 18 de Dic. de 2021
sin(2250 ) + cot(300 ) + tan-1 (1/2) + 10e-10 + 9x10-2 + (log1010)3 + (loge10)5
2 comentarios
Walter Roberson
el 18 de Dic. de 2021
sind(2250) + cotd(300) + atand(1/2) + 10e-10 + 9*10^-2 + log10(10)^3 + log(10)^5
Nishith Sarkar
el 29 de Jun. de 2022
Editada: Nishith Sarkar
el 29 de Jun. de 2022
Question: sin(225) + cot(30) + tan-1(1/2) + 10e-10 + 9x10-2 + (log1010)3 + (loge10)5
>> ns1=sind(225)
ns1 =
-0.7071
>> ns2=cotd(30)
ns2 =
1.7321
>> ns3=atand(1/2)
ns3 =
26.5651
>> ns4=10e-10
ns4 =
1.0000e-09
>> ns5=9*10^-2
ns5 =
0.0900
>> ns6=log10(10)^3
ns6 =
1
>> ns7=log(10)^5
ns7 =
64.7260
>> Nishith=ns1+ns2+ns3+ns4+ns5+ns6+ns7
Nishith =
93.4059
Adedotun Taiwo
el 14 de Feb. de 2022
Cos(45)
1 comentario
Walter Roberson
el 14 de Feb. de 2022
MATLAB is case sensitive. That would not work.
Cos(45)
Paulo correctly answered a decade ago that if you are using degrees, use sind() and cosd()
Nishith Sarkar
el 29 de Jun. de 2022
Editada: Nishith Sarkar
el 29 de Jun. de 2022
Answer please::
x=3cos50π+10sin300π-cos100π
2 comentarios
Walter Roberson
el 29 de Jun. de 2022
Editada: Walter Roberson
el 29 de Jun. de 2022
Pi = sym(pi);
x = 3*cos(50*Pi) + 10*sin(300*Pi) - cos(100*Pi)
Steven Lord
el 29 de Jun. de 2022
Ver también
Categorías
Más información sobre Trigonometry en Help Center y File Exchange.
Productos
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!