But it doesn't run with matrix  ? :

>>h
 
h =
 
                   [sin(x + y + z - t) + sin(x + y + z + t)]
                   [                                       ]
                   [cos(x + y + z - t) + cos(x + y + z + t)]

>> maple('trigsubs',h)
??? Error using ==> sym.maple
Error, (in trigsubs) unknown expression

Help me !

But it doesn't run with matrix  ? :

>>h
 
h =
 
                   [sin(x + y + z - t) + sin(x + y + z + t)]
                   [                                       ]
                   [cos(x + y + z - t) + cos(x + y + z + t)]

>> maple('trigsubs',h)
??? Error using ==> sym.maple
Error, (in trigsubs) unknown expression

Help me !

Thanks !

if i want : sin(x+y+z-t )+sin(x+y+z+t ) = 2sin(x+y+z)cos(t) how to do ?

Thanks !

if i want : sin(x+y+z-t )+sin(x+y+z+t ) = 2sin(x+y+z)cos(t) how to do ?

Thanks so much !

So, how to do this : sin(x+y) + sin(x-y)= 2sin(x)cos(y) ?

Thanks so much !

So, how to do this : sin(x+y) + sin(x-y)= 2sin(x)cos(y) ?

anyways, thanks :D

anyways, thanks :D