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AlladinOne [14]
3 years ago
14

How to find x in cos2x = 3/4? Please explain in detail.

English
1 answer:
julia-pushkina [17]3 years ago
3 0
Cos2x = 2cos^2 x-1  = 3/4

2cos^2x = 3/4 +1  = 7/4

cos^2x = 7/8

Taking square root

cosx = 0.93541

x = 20.705

Hope this helps
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