SOLUTION: sec(x)=radical 5 with sinx>0, find tan(2x)
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Question 873344: sec(x)=radical 5 with sinx>0, find tan(2x)
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
sec(x)=radical 5 with sinx>0, find tan(2x)
Given reference angle x is in quadrant I
Identity:
Calculator check:
cosx=√5/5
x≈63.43˚
2x≈126.86˚
tan 2x≈tan(126.86)≈-1.333…
exact value as calculated above=-4/3≈-1.333…
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