SSC SSC Selection Post (Phase 13) 2025 Mock Test Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
If sin m + sin n = p, cos m + cos n = q, then find the value of sin m × sin n + cos m × cos n.
1
p2 + q2 - 2
2
(p2 + q2 - 2)/2
3
p + q - pq
4
p + q + pq