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BSEB Bihar Board Class 10 Maths Solutions Chapter 8 त्रिकोणमिति का परिचय Ex 8.2

October 26, 2022 by Tabrej Alam Leave a Comment

BSEB Bihar Board Class 10 Maths Solutions Chapter 8 त्रिकोणमिति का परिचय Ex 8.2

Bihar Board Class 10 Maths त्रिकोणमिति का परिचय Ex 8.2

प्रश्न 2. सही विकल्प चुनिए और अपने विकल्प का औचित्य दीजिए–

प्रश्न 3. यदि tan(A + B) = √3 और tan(A – B) = 13√; 0° < A + B < 90°; A > B, तो A और B का मान ज्ञात कीजिए।

प्रश्न 4. बताइए कि निम्नलिखित में कौन-कौन सत्य हैं या असत्य हैं। कारण सहित अपने उत्तर की पुष्टि कीजिए।
(i) sin(A + B) = sin A + sin B
(ii) θ में वृद्धि होने के साथ sin θ के मान में भी वृद्धि होती है।
(iii) θ में वृद्धि होने के साथ cos θ के मान में भी वृद्धि होती है।
(iv) θ के सभी मानों पर sin θ = cos θ
(v) A = 0° पर cot A परिभाषित नहीं है।

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