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1. নিচের কোন বাক্যটি সত্য?

  • A. sin30°=cos30°
  • B. sin30°=cos30°
  • C. sin30°=cos30°
  • D. sin30°=cos30°

Answer: Option B

Explanation:

1) sin 30 = 1/2
Cos 30° = √3/2 
so option 1 is false
2) tan 45 = 1
cot 45 = 1
so, option 2 is true.


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