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MAXImum [283]
3 years ago
7

SecФ=2 what does Ф= in degrees and in degrees

Mathematics
2 answers:
devlian [24]3 years ago
5 0
SecФ=2 is the same as cosФ=1/2 because sec and cos are inverse functions.
So when solving cosФ=1/2, you need the find the angles where the cos graph equals 1/2. Generally you're supposed to memorize some angle values for your trig functions and this is one of them. The cosine graph is equal to 1/2 when Ф=60° or pi/3 in radians. The answer is also 300° or 5pi/3 radians because cosine is also positive in the fourth quadrant. 

Hope this helps<span />
Dmitry_Shevchenko [17]3 years ago
3 0
Sec <span>Ф = 2

We know, Cos </span>Ф = 1 / Sec <span>Ф
Cos </span><span>Ф = 1/2
</span>Ф = Cos⁻¹ (1/2)
<span>Ф = 60   [ Cos 60 = 1/2 ]

In short, Your Answer would be: 60 degrees

Hope this helps!</span>
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Answer:

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Step-by-step explanation:

-9x +5 < 17 AND   13x + 25 < -1

Solve each part separately and then put back together

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and

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13x +25-25 < -1-25

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Divide by 13

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