If \cos 2v=- \frac 19 and v is acute, then

poveli1e 2022-01-24 Answered
If cos2v=19 and v is acute, then determine the value of v
I have tried using the double angle identity
cos2v=cos2vsin2v
Ive
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Expert Answer

rakije2v
Answered 2022-01-25 Author has 12 answers
Hint
Solving:
cos(2x)=19
For the general case, let the R.H.S constant be k. Well
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