I don't know how to find the right answer for cos (2theta) ?
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- Thread Starter
- 02-02-2016 17:18
- 02-02-2016 17:20
Do you have a formula for cos(2A) in terms of sinA?
Usually called the double angle formula.
Spoiler:Showcos2A = 1 - 2sin^2(A)Last edited by 1420787; 02-02-2016 at 17:22.
- 02-02-2016 17:50