Respuesta :

thishigopal

Step-by-step explanation:

no calculator req

cos 60 is 0.5

so cos inverse of 0.5 os 60°

[tex]\\ \tt\hookrightarrow cos^{-1}(0.5)[/tex]

[tex]\\ \tt\hookrightarrow cos^{-1}\left(\dfrac{1}{2}\right)[/tex]

[tex]\\ \tt\hookrightarrow 60°[/tex]

Fact about cosine(cos)

[tex]\\ \tt\hookrightarrow cos\theta=\dfrac{Base}{Hypotenuse}[/tex]