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Marina86 [1]
3 years ago
9

Find the value of x, given cos 0 = 0.4 PLEASE HELP!!!!!! And explain if possible

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
8 0

Answer:

x=30

Step-by-step explanation:

For each right-angled triangle:

\cos\theta=\frac{cathetus \ adjacent \ \theta}{hypotenuse}

Because \cos \theta=0.4, \ \ cathetus\ adjacent \ \theta \ = \ 12, \ \ \ hypotenuse=x

we have an equation

0.4=\frac{12}x

multiplying both sides by x, we get 0.4x=12

dividing both sides by 0.4 and x=\frac{12}{0.4}

using calculator, we divide 12 by 0.4

and finally x=30


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