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vlabodo [156]
2 years ago
13

Solve 3cot (2x) =- Route3 for x, 0 = x < 360

Mathematics
1 answer:
ivolga24 [154]2 years ago
6 0

Answer:

x=60,150,240,330

Step-by-step explanation:

3 \cot(2x)  =  -  \sqrt{3}

\cot(2x)  =  \frac{  - \sqrt{3} }{3}

Take the arc cot of both sides

\cot {}^{ - 1} ( \cot(2x) )  =  \cot {}^{ - 1} (  \frac{ -  \sqrt{3} }{3}  )

2x = 120

Remember cotangent has a period of 180 degrees

2x = 120 + 90(n)

where n is 0, 1,2,3,4,5.....

Isolate x.

x = 60 + 90(n)

where n is 0, 1,2,3,4,5,6.

Keep plugging in integers as long they are in the interval [0,360].

We get

60,150,240,330.

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