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Thepotemich [5.8K]
3 years ago
15

7 cos x+1=6 secx solve for x

Mathematics
1 answer:
jonny [76]3 years ago
6 0
7cos(x) + 1 = 6sec(x)
7cos(x) + 1 = 6/cos(x)
7cos^(x) + cos(x) = 6
7cos^(x) + cos(x) - 6 = 0
[7cos(x) - 6][cos(x) + 1] = 0
cos(x) = 6/7 , x = arccos(6/7) and
cos(x) = -1, x = 180
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