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Anna71 [15]
3 years ago
11

Solve this equation: 2cosx+5=4

Mathematics
2 answers:
erma4kov [3.2K]3 years ago
8 0
\frac{2 \pi }{3}
tangare [24]3 years ago
5 0

Answer:

2pi/3 and 4pi/3

Step-by-step explanation:

Solve for cosine and you will get cosx=-1/2. Using the unit circle find every point where the x value = -1/2 (since cosine is x). You will find that the angles where x = -1/2 are 2pi/3 and 4pi/3

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