SOLUTION: Solve equation for all value of ø if ø measure in degrees
cos2ø+3cosø -1=0
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Question 403218: Solve equation for all value of ø if ø measure in degrees
cos2ø+3cosø -1=0
Answer by Tatiana_Stebko(1539) (Show Source): You can put this solution on YOUR website!
Use FORMULA
Use FORMULA
Let ,
or
or >1
, so ,
Use FORMULA if , then w=+-arccos(a)+360k, k is any integer
w=+-arccos(1/2)+360k
w=+-60+360k, k is any integer
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