defence exam Indian Navy Fireman/Fire Engine Driver Mock Test 2024 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
If x = m secA + n tanA and y = m tanA + n secA, then what is x2 - y2 equal to ?
1
m2 - n2
2
m2 + n2
3
m2 + n2 - mn
4
m2 - n2 + mn