Evaluate 2cot²45° + 3sec²30° − 4sin²30°.
2cot²45° + 3sec²30° − 4sin²30° का मान ज्ञात कीजिए।
Answer और ExplanationAnswer and explanation
Answer: (C) 5
cot 45° = 1, sec 30° = 2√3, sin 30° = 12
2(1)² + 3 × 43 − 4 × 14 = 2 + 4 − 1 = 5
✓
मान 5 है।
cot 45° = 1, sec 30° = 2√3, sin 30° = 12
2(1)² + 3 × 43 − 4 × 14 = 2 + 4 − 1 = 5
✓
The value is 5.
Source: RRB Group D · 05 Feb 2026 · Shift 2। Solution: Prashant Sir, Vijayastra।Source: RRB Group D · 05 Feb 2026 · Shift 2. Solution by Prashant Sir, from Vijayastra.