If , show that , and deduce that I have already shown when , since . But I don't know how to deduce that . Thanks!
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Hello arze Originally Posted by arze If , show that , and deduce that I have already shown when , since . But I don't know how to deduce that . Thanks! Four steps: Use the identities and in the equation Divide through by (it's non-zero, so that's OK) Replace by Solve the quadratic for , taking the positive root. Can you complete it now? Grandad
Yes! i can complete it now! thanks
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