RRB Technician Grade 3 previous year question
If cotθ = 1/√3, (0° < θ < 90°), then the value of (2 − sin²θ)/(1 + cos²θ) + (cosec²θ + sec²θ) is:
Asked in RRB Technician Grade 3 (10 Mar 2026 Shift 1) · Quantitative Aptitude
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Correct answer: (C) 19/3
cot θ = 1/√3 gives θ = 60°, so sin²θ = 3/4 and cos²θ = 1/4. Then (2−3/4)/(1+1/4) + (4/3 + 4) = (5/4)/(5/4) + 16/3 = 1 + 16/3 = 19/3.
हिंदी में प्रश्न
यदि cotθ = 1/√3, (0° < θ < 90°) है, तो (2 − sin²θ)/(1 + cos²θ) + (cosec²θ + sec²θ) का मान ज्ञात कीजिए।
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उत्तर और व्याख्या देखें
सही उत्तर: (C) 19/3
cot θ = 1/√3 से θ = 60° प्राप्त होता है, अतः sin²θ = 3/4 और cos²θ = 1/4 है। फिर (2−3/4)/(1+1/4) + (4/3 + 4) = 1 + 16/3 = 19/3 प्राप्त होता है।
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