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+--- Thread: simplify(9*sin(3)-9*sin(8)) gives long results (/thread-3311.html)
simplify(9*sin(3)-9*sin(8)) gives long results - jepessen - 03-08-2015 08:55 PM
Hi.
I have this expression:
9*sin(3)-9*sin(8)
I tried to use "simplify" in order to obtain a more compact result. I was expecting
9*(sin(3)-sin(8))
But I've obtained
1152*cos(1)*sin(1)^7-1728*cos(1)*sin(1)^5+720*cos(1)*sin(1)^3-72*cos(1)*sin(1)-36*sin(1)^3+27*sin(1)
The calculator has created an expression in which sin and cos have same argument.
Is this correct? because I did not expected something like this from the "simplify" command.
Is there another way to collect terms and obtain the expression that I expected?
RE: simplify(9*sin(3)-9*sin(8)) gives long results - Mark Hardman - 03-08-2015 09:11 PM
You can use 'collect' to get the result you want:
collect(9*SIN(3)-9*SIN(8)) ----> 9*(SIN(3)-SIN(8))
RE: simplify(9*sin(3)-9*sin(8)) gives long results - jepessen - 03-08-2015 09:19 PM
It seems to work. Thanks.