We have to find the zeros of f(x) = sin x + cos x

f(x) = sin x + cos x = 0

=> sin x = -cos x

=> tan x = -1

x = arc tan (-1)

In the interval (0, pi) , x = -pi/4 + pi = 3*pi/4

**The required value is x = 3*pi/4**

We have to find the zeros of f(x) = sin x + cos x

f(x) = sin x + cos x = 0

=> sin x = -cos x

=> tan x = -1

x = arc tan (-1)

In the interval (0, pi) , x = -pi/4 + pi = 3*pi/4

**The required value is x = 3*pi/4**