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find the value of: sin2 30° + cos2 30°+ cot2 45° - Mathematics

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Sum

find the value of: sin2 30° + cos2 30°+ cot2 45°

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Solution

sin2 30° + cos230° + cot2 45° = `(1/2)^2 + (sqrt3/2)^2 + 1^2 = (1)/(4) + (3)/(4) + 1 = 2`

Concept: Trigonometric Ratios of Some Special Angles
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Selina Concise Mathematics Class 9 ICSE
Chapter 23 Trigonometrical Ratios of Standard Angles [Including Evaluation of an Expression Involving Trigonometric Ratios]
Exercise 23 (A) | Q 1.5 | Page 291
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