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Solve the equation sin x + cos x = 0.
Ax = nπ + π/4, n ∈ Z
Bx = 2nπ − π/4, n ∈ Z
Cx = nπ/4, n ∈ Z
Dx = nπ − π/4, n ∈ Z
Answer & Solution
Correct answer: D. x = nπ − π/4, n ∈ Z
The equation gives tan x = −1, so x = nπ − π/4.
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