alleryএকটি সূক্ষ্মকোণ θ-এর পূরক কোণের sine, θ-এর কোন অনুপাতের সমান?
Atan θ
B−cos θ
Csin θ
Dcos θ
Answer & Solution
Correct answer: D. cos θ
দুটি সূক্ষ্মকোণ পরস্পরের পূরক, তাই একটির sine অন্যটির cosine-এর সমান।
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