2sin^2-2sin-1=0
Use the quadratic formula to find all degree solutions. Use a calculator to approximate all answers to the nearest tenth of a degree.

Question

2sin^2-2sin-1=0
Use the quadratic formula to find all degree solutions. Use a calculator to approximate all answers to the nearest tenth of a degree.

anonymous · Answer

Sorry, I'm having major problems with this one. It is unfactorable, so... I don't know.

anonymous · Answer

Wait... Quadratic formula. Got it!!!!!!!!

anonymous · Answer

equation trigolometry ^2, solve sinx as x

anonymous · Answer

I did that and used the quadratic formula... I don't know where to go from (1+sqrt3)/2.

anonymous · Answer

(1+sqrt3)/2 is wrong;  (1-sqrt3)/2 right ; because -1 <= sinx<=1

anonymous · Answer

OMG! No wonder! I typed it into my calculator and got an error! When I typed in your answer, I got an angle! Thank you!!!!

anonymous · Answer

ok.

anonymous · Answer

Ok... I believe I did it wrong. I got 21.5 deg as an answer and it's wrong.

anonymous · Answer

yea