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Sagot :
Answer:
sec θ = -1 θ = π+2nπ
sec θ = 2 θ = π/3+2nπ or 5π/3+2nπ
Step-by-step explanation:
tan² θ = 1 + sec θ
sec² θ - 1 = 1 + sec θ
sec² θ - sec θ - 2 = 0
(sec θ + 1) (sec θ - 2) = 0
sec θ = -1 θ = π+2nπ
sec θ = 2 θ = π/3+2nπ or 5π/3+2nπ
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