Question

the calculation of this​

Answer 1

Answer:

$\sqrt{ {60}^{2} + {60}^{2} - 2 \times 60 \times 60 \sin(30) } \\ = \sqrt{ {60}^{2} (1 + 1 - 2 \times \frac{1}{2}) } \\ = \sqrt{ {60}^{2} } \\ = 60$