Question

cos 90 degree cos30 degree+sin 90 degree sin30 degree​

Answer 1

Answer:

$\frac{1}{2}$

Step-by-step explanation:

cos90°.cos30° + sin90°.sin30°

$= 0. \frac{ \sqrt{3} }{2} + 1. \frac{1}{2} \\ = 0 + \frac{1}{2} \\ = \frac{1}{2}$