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# Trigonometric equation? Finding value for "major"? Urgent!!

Posted on 2013-10-24
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Hello Experts,

Trying to find the value for "major".

Impact angle = Sin^-1 (Minor/Major)

70(degrees) = Sin^-1(3.14159/Major)

An answer would be great.  Thank you!
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Question by:Brent Johnson

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byundt earned 1000 total points
ID: 39599227
If you take the Sine of both sides of the equation, you should be able to solve for Major

Major = Minor/sin(70 degrees)
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ozo earned 1000 total points
ID: 39599230
70(degrees) = Sin^-1(3.14159/Major)
sin(70(degrees)) = (3.14159/Major)
Major = 3.14159/sin(70(degrees))
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Author Closing Comment

ID: 39599261
Thank you everyone!  A solid answer would have been great, but this was almost just as good, and eventually I did get the answer so I am definitely happy.  Thanks again.
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Expert Comment

ID: 39599263

Sin (70 degrees) = 0.939693

Therefore, Sin^-1( 0.939693) = 70 degrees

Thus, 3.14159/Major = 0.939693

And, Major = 3.3432
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Expert Comment

ID: 39599266
You are too quick! :-)
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LVL 85

Expert Comment

ID: 39599311
(one might wonder how a number like 3.14159 can end up in a place like Sin^-1(3.14159/Major))
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