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find the value of: cosec2 60° - tan2 30° - Mathematics

प्रश्न

find the value of: cosec² 60° - tan² 30°

योग

उत्तर

cosec² 60° – tan² 30° = `(2/sqrt3)^2 – (1/sqrt3)^2 = (4)/(3) – (1)/(3) = 1`

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Q 1.4 Q 1.3 Q 1.5

अध्याय 23: Trigonometrical Ratios of Standard Angles [Including Evaluation of an Expression Involving Trigonometric Ratios] - Exercise 23 (A) [पृष्ठ २९१]

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सेलिना Concise Mathematics [English] Class 9 ICSE

अध्याय 23 Trigonometrical Ratios of Standard Angles [Including Evaluation of an Expression Involving Trigonometric Ratios]
Exercise 23 (A) | Q 1.4 | पृष्ठ २९१