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Question
Using trigonometric tables, find the approximate value of cosec 86°.
Sum
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Solution
Given: cosec 86° = `1/sin 86^circ`.
From trigonometric tables, sin 86° = 0.9976.
Hence, cosec 86° = `1/0.9976 ≈ 1.002402... ≈ 1.0024`.
cosec 86° ≈ 1.0024.
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