3 cos2 60'+2cot2 30'-5 sin'2 45 degree
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Answer:
3cos²60 + 2cot²30 - 5sin²45
= 3*(1/2)² + 2(√3)² - 5(1/√2)²
= 3/4 + 2*3 - 5/4
= 3/4 + 6 - 5/4
= 6-1/2
= 11/2
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