Question
Download Solution PDFযদি 7 sinθ + 24 cosθ = 25 হয়, তাহলে (sin θ + cos θ) এর মান কত?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFধারণা:
sin 2 θ + cos 2 θ = 1
গণনা:
7 sinθ + 24 cosθ = 25
উভয় পক্ষের 25 দ্বারা ভাগ করলে আমরা পাই
আমরা জানি যে,
sin 2 θ + cos 2 θ = 1
sin θ.sin θ + cos θ.cos θ = 1 ....(ii)
equ (i) এবং (ii) তুলনা করার ক্ষেত্রে
sin θ =
cos θ =
এখন, (sinθ + cosθ)
=
=
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