alleryThe general solution of cos x = 0 is:
Ax = nπ
Bx = (n + 1) π/4
Cx = 2nπ
Dx = (2n + 1) π/2, n ∈ Z
Answer & Solution
Correct answer: D. x = (2n + 1) π/2, n ∈ Z
1. cos x = 0 at x = π/2, 3π/2, 5π/2,... — odd multiples of π/2.
2. General form: x = (2n + 1) π/2, n ∈ Z.
_Source: syllabus Maths Ch 3 §3.5 General Solutions_
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