Question

If cosθ=1/2 , sin∅=1/2 then θ+∅ =​

Answer 1

$\cos \alpha = \frac{1}{2} \\ \cos\alpha = \cos {60}^{o} \\ \alpha = {60}^{o} \\ \\ \sin \beta = \frac{1}{2} = \sin {30}^{o} \\ \beta = {30}^{o} \\ \alpha + \beta = {60}^{o} + {30}^{o} = {90}^{o}$