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Find the interval in which function f(x) = sinx+cosx is increasing.

Posted: Wed Jul 13, 2022 8:07 pm
by answerhappygod
a) (5π/4, 2π)
b) [0, π/4) and (5π/4, 2π]
c) (π/4, -5π/4)
d) (-π/4, π/4)