math
posted by raghunath laguri .
differentiate of y=sinx+cosx

if y = sinx, y' = cosx
for sinx < 0, sinx = sinx
so, y' = cosx * sinx/sinx, or
y' = sinx cotx
similarly for cosx
posted by raghunath laguri .
differentiate of y=sinx+cosx
if y = sinx, y' = cosx
for sinx < 0, sinx = sinx
so, y' = cosx * sinx/sinx, or
y' = sinx cotx
similarly for cosx