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ST T T S MR et(X) sin3A +cos2B=2 20T cos 2A +sin 3B G शान कह १ _53k |
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Answer» Answer:1/2Step-by-step explanation:Here, sin 3A + cos 2B = 2 Let sin 3A = cos 2B = 1We know that, sin 90 = 1 Here, sin 3A = 1 ∴ 3A = 90 A = 90 ÷ 3 = 30 We get A = 30 here. Let's find B. We know that, cos 0 = 1 Here, cos 2B = 1 ∴ 2B = 0 B = 0 ÷ 2 = 0 We get B = 0. Now, cos 2A + sin 3B = cos 2 × 30 + sin 3 × 0 = cos 60 + sin 0 = 1/2 + 0 = 1/2 |
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