3 cos^2 60 + 2 cot^2 30 - 5 sin^2 45 = ? (a) 13/6 (b) 17/4 (c) 1 (d) 4
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option B is correct.
hope it will help you.
hope it will help you.
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Answered by
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➡3cos²60 + 2cot²30 - 5 sin²45
➡3(1/2)² + 2(√3)² - 5(1/√2)²
➡3/4 + 6 - 5/2
➡(3 + 24 - 10)/4
➡17/4
Hence, option (b)17/4 is the correct option.
HOPE IT HELPS YOU ☺☺
➡3(1/2)² + 2(√3)² - 5(1/√2)²
➡3/4 + 6 - 5/2
➡(3 + 24 - 10)/4
➡17/4
Hence, option (b)17/4 is the correct option.
HOPE IT HELPS YOU ☺☺
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