Question:
What is (p2 + q2 + r2) equal to?
What is (p2 + q2 + r2) equal to?
Options:
- a) 1 2
- b) 1
- c) 3 2
- d) 2 Direction for Questions (44-45): Consider the following for the two (02) items that follow: Let p = [sin a – sin(a – 90°)]. Solved Paper – 2025 (I)
- a) 1 2
- b) 1
- c) 3 2
- d) 2 Direction for Questions (44-45): Consider the following for the two (02) items that follow: Let p = [sin a – sin(a – 90°)]. Solved Paper – 2025 (I)
correct answer : c)
Explanation:
(p + q + r)2 = p2 + q2 + r2 + 2 (pq + qr + rp)
Þ 0 = p2 + q2 + r2 + 2 -
3
4
Þ p2 + q2 + r2 = 3
2
(p + q + r)2 = p2 + q2 + r2 + 2 (pq + qr + rp)
Þ 0 = p2 + q2 + r2 + 2 -
3
4
Þ p2 + q2 + r2 = 3
2