Question

evaluate: 5cos^2 60° +4sec^2 30°-tan^2 45° / sin^2 30° + cos^2 30°

Answer 1

Hey !

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Answer 2

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 !!!

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