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snow_lady [41]
2 years ago
10

Find x using the trig ratios please

Mathematics
1 answer:
Karo-lina-s [1.5K]2 years ago
7 0

Answer:

12.9

Step-by-step explanation:

cos 72 = 4/x

x = 4/cos72

x = 12.9

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You could also use the fact that the area of a square is (length of one side)^2, and then take (1/4) of this area to obtain the area of ONE triangular section.   Doing the problem this way, we get (1/4) (3 sqrt(2) )^2.  Thus, 
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3 years ago
Question 2 (1 point)
nikdorinn [45]

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6 0
2 years ago
Solve the system by substitution!
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3 years ago
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9514 1404 393

Answer:

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