Question
If sinx = 1/4 Find the exact value of cos2x
I used the formula for double angle identities :
cos2x = 1-2sin^2x
and got the answer 1/2
The book says the answer is 7/8
How would they get to that conclusion?
I used the formula for double angle identities :
cos2x = 1-2sin^2x
and got the answer 1/2
The book says the answer is 7/8
How would they get to that conclusion?
Answers
Found my mistake ....
All is good now
Thanks for the help earlier Damon
Don
All is good now
Thanks for the help earlier Damon
Don
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