Two circles of radii 4 cm and 1 cm touch each other externally and is the angle…

MATHEMATICS · Subjective · CBSE · Mathematics · Circles · Circles

Problem

Two circles of radii 4 cm and 1 cm touch each other externally and

\theta

is the angle contained by their direct common tangents. Find the value of

\sin \frac{\theta}{2} + \cos \frac{\theta}{2}