If `f(x)=10cosx+(13+2x)sinx` then `f'(x)+f(x)=`

f (x) = 10 cos x + (13 + 2x) sin x implies f''(x) + f(x) =

If f(x)=(1-cosx)/(1-sinx)," then: "f'((pi)/(2)) is

Sometimes functions are defined like f(x)=max{sinx,cosx} , then f(x) is splitted like f(x)={{:(cosx, x in (0,(pi)/(4)]),(sinx, x in ((pi)/(4),(pi)/(2)]):} etc. If f(x)=max{(1)/(2),sinx} , then f(x)=(1)/(2) is defined when x in

Sometimes functions are defined like f(x)=max{sinx,cosx} , then f(x) is splitted like f(x)={{:(cosx, x in (0,(pi)/(4)]),(sinx, x in ((pi)/(4),(pi)/(2)]):} etc. If f(x)=max{(1)/(2),sinx} , then f(x)=(1)/(2) is defined when x in

f(x)=sinx+cosx+3 . find the range of f(x).

f(x)=sinx+cosx+3 . find the range of f(x).

f(x)=sinx+cosx+3 . find the range of f(x).

f(x)=sinx+cosx+3 . find the range of f(x).

If f(x)=(2-3cosx)/(sinx) , then f'((pi)/(4)) is equal to