Question

5 cos ^2 60°+ 4 sec^2 30° - tan^2 45°÷
sin ^2 30°+cos ^2 30°​

Answer 1

Hey !!!

5cos²60° + 4sec²30° -tan²45°

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sin²30° + cos²30°

=> 5× (1/2)² + 4 ×(2/√3)² - (1)²

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(1/2)² + (√3/2)²

=> 5×1/4 + 4× 4 /3 -1

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1/4 + 3/4

=> 5/4 + 16/3 -1

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1 + 3/4

=> 15 + 64 - 12/12 { lcm}

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4/4

=>55/12 = 21/4

55/12 Answer

Hope it helps you !!!