SSC SSC Selection Post (Phase 13) 2025 Mock Test Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
যদি tan A + sin A = x, tan A — sin A = y হয়, তাহলে x2 — y2 এর মান কী?
1
\(\rm \sqrt{xy}\)
2
\(\rm 4\sqrt{xy}\)
3
\(\rm4\sqrt{\frac{x}{y}}\)
4
\(\rm2\sqrt{\frac{x}{y}}\)