Permanent old-paper question page

SR. TEACHER (SEC. EDU.) COMP. EXAM 2025 2026 question with answer

Read and share this previous-year question using its permanent link.

Question 8

Question Paper for Sr. Teacher (Sec. Edu.) Comp. Exam - 2025(Mathematics) Rajasthan हिन्दी MCQ

Q8.a⃗, b⃗ तथा c⃗ तीन इकाई सदिश इस प्रकार हैं कि |a⃗ + b⃗ + c⃗| = 2। a⃗, b⃗ के लम्बवत है। यदि c⃗, a⃗ व b⃗ के साथ क्रमशः α व β कोण बनाता हो, तो (cos²α − cos²β + cos β) का मान है —