Question

4 cot^2 45° - sec^2 60° + sin^2 60° + cos^2 90°​

Answer 1

Answer:

41/12

Step-by-step explanation:

• Cot 45°=1
• Sec 60°=2/root 3
• Sin 60°= root 3 /2
• Cos 90°=0

Then,

• 4 cot^2 45° - sec^2 60°+sin^2 60°+cos^2 90°
• 4×1- 4/3 + 3/4 + 0
• 4 - 4/3 + 3/4
• 48-16+9/12
• 48-7 /12
• 41/12

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