railway RRB Technician Grade 3 Mock Test 2024 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
যদি x = a sec θ + b tan θ এবং y = a tan θ + b sec θ হয়, তাহলে x2 – y2 এর মান খুঁজুন।
1
a + b
2
a2 – b2
3
\(\sqrt {{a^2} + {b^2}}\)
4
a2 + b2