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victus00 [196]
3 years ago
10

-4 -6 cos x = -4 -4 cos x for 0degrees less then or equal to x less then or equal to 180 degrees

Mathematics
1 answer:
cestrela7 [59]3 years ago
3 0

Answer:

x = 90°

Step-by-step explanation:

Given

- 4 - 6cosx = - 4 - 4cosx ( add 4cosx to both sides )

- 4 - 2cosx = - 4 ( add 4 to both sides )

- 2cosx = 0, hence

cosx = 0

x = cos^{-1}(0) = 90° for 0 ≤ x ≤ 180

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