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Mekhanik [1.2K]
2 years ago
11

If Sin x = -¼, where π < x < 3π∕2 , find the value of Cos 2x

Mathematics
1 answer:
Sliva [168]2 years ago
5 0

Answer: 7/8

Cos2x has 3 formulas, Sinx is given in the question, we should use the formula with sinus. I guess that's the solution.

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Hey there!

The solution to your question is

We simply plug the "r" value into the equation and solve:

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Hope it helps! Have an amazing day, and remember, You've got this!

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