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Karolina [17]
3 years ago
5

What is the angle pair relationship between angles 6 and 8?

Mathematics
1 answer:
djverab [1.8K]3 years ago
5 0
Those are vertical angles
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Solve 4 cos2x-3 = 0 for all real values of x.
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Fixing the squared cosine doesn't discriminate among quadrants.  There's one in every quadrant

cos x = ± cos(π/6)

Let's do plus first.  In general, cos x = cos a has solutions x = ±a + 2πk integer k

cos x = cos(π/6)

x = ±π/6 + 2πk

Minus next.

cos x = -cos(π/6)

cos x = cos(π - π/6)

cos x = cos(5π/6)

x = ±5π/6 + 2πk

We'll write all our solutions as

x = { -5π/6, -π/6, π/6, 5π/6 } + 2πk integer k

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