Question 1205833

{{{sin^2(x) - 5 = cos^2(x) - 1}}}

{{{sin^2(x) - 5 = 1-sin^2(x) - 1}}}

{{{sin^2(x) - 5 = -sin^2(x) }}}

{{{sin^2(x) +sin^2(x) =5 }}}

{{{2sin^2(x) =5 }}}

{{{sin^2(x) =5/2}}}

{{{sin(x) =sqrt(5/2)}}}

{{{x=sin^-1(sqrt(5/2))}}}=> no real roots


answer:

D. no solution