অন্তৰ্ভুক্ত কোণটো কিমান হ'লে cosine ৰ সূত্ৰটো পাইথাগোৰাছৰ উপপাদ্যলৈ ৰূপান্তৰিত হয়?
A90°
B180°
C0°
D60°
Answer & Solution
Correct answer: A. 90°
90 ডিগ্ৰীত cos C শূন্য হয়, যিয়ে ক্ৰছ পদটো আঁতৰাই পেলায় আৰু c squared = a squared + b squared অৱশিষ্ট ৰাখে।
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