Solve cosx 073 on 0 lessthanorequalto x SolutionCos x can

Solve cos(x) = - 0.73 on 0 lessthanorequalto x

Cos x can be expand by the formula

Cosx=1-1/2x^2+1/24x^4.... for real x

Neglecting the higher power of x,we get

Cosx=1-1/2x^2 ,cos x=-0.73

so -0.73=1-1/2x^2

x^2=1.73×2=3.46

x=3.46=+1.8601,-1.8601

in terms of , x=+or-0.592

A=0.592,B=2-0.592=1.408