Explain how to solve for x the angle tanxsinx292000Solutiont
Explain how to solve for x (the angle) tanx((sinx)^2)=92000
Solution
tanx((sinx)^2)=92000
but tanx = sinx/cosx
cosx = sqrt(1- sin^2 x)
so sinx /sqrt(1- sin^2 x) . ((sinx)^2) = 92000
(sinx)^3 = 92000 sqrt (1- sin^2 x)
squaring on both sides
(sinx)^6 = (92000)^2 (1-sin^2x)
(sinx)^6 +(92000)^2 (sinx)^2 -(92000)^2 =0
now we have to solve this
Simplified form is:
(sinx)^6 +8464000000 x^2 - 8464000000 =0
The solutions of this equation are:
X1 = 1
X2 = -1
X3 = -214.47552+214.47669*i
X4 = -214.47552-214.47669*i
X5 = 214.47552+214.47669*i
X6 = 214.47552-214.47669*i
so we leave all the \'i; values sinx = 1 or x= -1
so x = pi/2 or -pi/2
