Practicing Success
Practicing Success
CUET Preparation Today
$\frac{\cos 20^{\circ}}{\sin 70^{\circ}}+\frac{\cos \theta}{\sin \left(90^{\circ}-\theta\right)}=$ _________ . |
-2 $\frac{1}{2}$ $-\frac{1}{2}$ 2 |
2 |
\(\frac{cos20°}{sin70°}\) + \(\frac{cosθ}{sin( 90° -θ ) }\) We know , sinA = cos( 90° - A ) = \(\frac{cos20°}{cos( 90° - 70° )}\) + \(\frac{cosθ}{cos θ }\) = \(\frac{cos20°}{cos20° }\) + 1 = 1 + 1 = 2 |
