Find the value of x? Round to the nearest tenth

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1 Answer
Hriman
Mar 29, 2018

#xapprox59°#

Explanation:

Remember Cosine of an angle is #"adjacent side"/"hypotenuse"#

So let the angle be #x#:
#Cosx= "adjacent side"/"hypotenuse"#

#Cosx=13/25#

To solve for #x#, use inverse cosine:

#x=arccos(13/25)#

Same thing as:
#x=cos^-1(13/25)approx 59°#

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