Find x. a. 30.9 b. 34.4 c. 17.1 d. 15.4

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Mark Unwin asked Oct 2, 2022

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20 votes

Find x.
a. 30.9
b. 34.4
c. 17.1
d. 15.4

Mathematics
high-school

Mark Unwin asked Oct 2, 2022

by Mark Unwin

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1 Answer

22 votes

Answer:

x = 17.1

Explanation:

Since this is a right triangle, we can use trig functions

cos theta = adj / hyp

cos 42 = x/23

23 cos 42 = x

17.09233 =x

Rounding to 1 decimal place

x =17.1

Jschlereth answered Oct 9, 2022

by Jschlereth

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