Re: Variation of Parameters

Re: Variation of Parameters

Thanks a lot, but somehow I did not know that -sec(x)tan(x)sin(x) are equal to -sinē(x)/cosē(x)

or that sec(x)tan(x)cos(x) = tan(x)

I'd hate to bother you (or anyone else) but is there something like a list where I can see that -sec(x)tan(x)sin(x)= ... etc?

or how someone would put it if i had to take

tan(x)cos(x)?

Thanks a lot!

Re: Variation of Parameters

Quote:

Originally Posted by

**MuhTheKuh** Thanks a lot, but somehow I did not know that -sec(x)tan(x)sin(x) are equal to -sinē(x)/cosē(x)

or that sec(x)tan(x)cos(x) = tan(x)

I'd hate to bother you (or anyone else) but is there something like a list where I can see that -sec(x)tan(x)sin(x)= ... etc?

or how someone would put it if i had to take

tan(x)cos(x)?

Thanks a lot!

Just rewrite everything in terms of sines and cosines.