How do you solve #cos 38 = 45/x#?

1 Answer
Barney V.
Dec 8, 2016

#x =5710581972#

Explanation:

#Cos 38 = 0.788010753#
#Cos38/1 = 45/x#
#Cos38x=45#
#0.788010753*x =45# (cross multiplication)
#x =45/0.788010753#
#x = 57.10581972#
Check answer by substituting x=57.10581972 in question
#Cos38=45/x#
#Cos38=45/57.10581972#
#=0.788010753#
and Cos38=0.788010753
Conclusion:- This is the correct answer.

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