Math, asked by A716, 6 months ago

If Cosx = 1/4
then the value of Cos 3x=?
a)11/16
b)-11/16
c)16/11
d)-16/11

Answers

Answered by shebirizu389

0

Answer:

b)-11/16

Step-by-step explanation:

using cos 3x=4cos ^3x-3cosx

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