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Using trigonometric tables, find the approximate value of cosec 86°. - Mathematics

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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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Chapter 19: Trigonometric tables - Exercise 19A [Page 431]

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Nootan Mathematics [English] Class 10 ICSE
Chapter 19 Trigonometric tables
Exercise 19A | Q 1. (vi) | Page 431
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