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What is the value of cos 45° + sin 45°?(a) 1(b) \( \frac {1}{4}\)(c) \( \frac {3}{4}\)(d) √2The question was posed to me in unit test.I'm obligated to ask this question of Trigonometric Ratios ofSpecific Angles topic in division Trigonometry of Mathematics – Class 10

Answer»

The correct option is (d) √2

Best explanation: COS 45° + SIN 45° = \( \frac {1}{\SQRT 2} + \frac {1}{\sqrt 2}\)

= 2 × \( \frac {1}{\sqrt 2}\)( SINCE, 2 = √2 × √2 )

= √2



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