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What is the value of cos (30° + 60°)?(a) 1(b) \(\frac {1}{4}\)(c) \(\frac {3}{4}\)(d) 0This question was addressed to me during an interview.My doubt is from Trigonometric Ratios of Specific Angles in chapter Trigonometry of Mathematics – Class 10

Answer»

The CORRECT choice is (a) 1

For explanation I would say: COS (30° + 60°) = cos (90°) = 1

The VALUE of cos (90°) is 1



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