How do I find or derive the value of sin 18
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How do I find or derive the value of sin 18

[From: ] [author: ] [Date: 11-09-18] [Hit: ]
Now, you have just solve a cubic equation, that is simple algebra :)-sin 18 = -0.75098(use your scientific calculator.(sin18) = 0 (no variable, its a constant!......
If you want just the value then you can use scientific calculator, but if you want to find it then you have use the formula for sin 5x :), where x=18. You can see the derivation of sin 5x in terms of x at http://www.exposix.com/members/answers/H… . Now, you have just solve a cubic equation, that is simple algebra :)

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sin 18 = -0.75098 (use your scientific calculator.)

(sin18)' = 0 (no variable, it's a constant!)
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