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Find the principal solution of equations :(ii)sec x=2 |
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Answer» secx=2 ⇒ cos x = 1/2 cos x = cosπ/3 Using formula for general soluton of cos x = cos y i.e x = 2nπy We have x = 2nπ-π/ 3 The solutions that lie in the interval 0 to 2π, both included are principal solution So they are , in this case , π/3, 2π-π/ 3 = 5π/ 3 |
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