Practicing Success
If $3 \sec^{2} \theta + \tan \theta - 7 = 0$, $0^{\circ} < \theta < 90^{\circ}$,then what is the value of $\left(\frac{2 \sin \theta + 3 cos \theta}{cosec~ \theta + \sec \theta}\right)$ ? |
10 $\frac{5}{2}$ $\frac{5}{4}$ 4$\sqrt{2}$ |
$\frac{5}{4}$ |
3sec2θ + tanθ - 7 = 0 Put θ = 45º 3 × 2 + 1 - 7 = 0 LHS = RHS ( satisfied with angle 45º ) Now , \(\frac{2sinθ + 3cosθ }{cosecθ + secθ}\) = \(\frac{2× 1/√2 + 3× 1/√2 }{√2 + √2}\) = \(\frac{2 + 3 }{2×√2×√2 }\) = \(\frac{5}{4}\) |