Question

Cat face sin^120+cos^60?

Answer 1

     
[tex]\displaystyle sin\,120^o+cos\,60^o = ~~~~~(Pe~sin\,120^o ~~ il~ aducem ~la~ cadranul ~1 ) \\ = sin(180^o-60^o) + cos\,60^o \\ \\ = sin\,60^o + cos\,60^o = \frac{ \sqrt{3} }{2} + \frac{1}{2} = \boxed{\frac{ \sqrt{3} +1}{2}}[/tex]