allerysec²θ থেকে tan²θ বিয়োগ করলে সর্বদা কোন ধ্রুবকটি পাওয়া যায়?
A2
B0
C1
D−1
Answer & Solution
Correct answer: C. 1
sin squared plus cos squared equals 1-কে cos squared দিয়ে ভাগ করলে পাওয়া যায় tan squared + 1 = sec squared।
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