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lesya [120]
3 years ago
9

324=1409-1400cos(x) What’s x equal ?

Mathematics
1 answer:
exis [7]3 years ago
8 0

Answer:

x ≈ 39.2°

Step-by-step explanation:

Given

324 = 1409 - 1400 cos x ( subtract 1409 from both sides )

-1085 = - 1400 cos x ( divide both sides by - 1400 )

0.775  = cos x, thus

x = cos^{-1} (0.775) ≈ 39.2° ( to 1 dec. place )

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