railway RRB JE (CBT I + CBT II) Mock Test 2024 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
If x = p sec A cos B , y = q sec A sin B and z = r tan A , what is the value of the following expression?
\(\frac{x^2}{p^2} + \frac{y^2}{q^2} - \frac{z^2}{r^2}\)
1
1
2
\(p^2 + q^2 - r^2 \)
3
\(p^2 - q^2 + r^2\)
4
0