Question is as below:

Asked by spuneet23 | 20th Sep, 2010, 05:37: PM

Expert Answer:

f(x) = cosx-3sinx=212cosx-32sinx                                       =2cos3+x using formula cos(A+B) -2f(x)2-22cos3+x2-1cos3+x1hence 03+x            -3x-3-3x23 so domain =D=-3,23 ">

Answered by  | 20th Sep, 2010, 10:43: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.