- #1
Chandasouk
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Homework Statement
I need help evaluating the integral Cotx3/10
I factored out the 1/10 from the integral and am just left with (1/10)*Cotx3
from here i do not really know what to do. I rewrote it in terms of sine and cosine to get
(1/10)*(Cosx3/Sinx3)dx
I multiply the integral by (1/Sinx3) to get rid of the denominator and am left with
(1/10)*(Cosx3dx
I factor out a (Cosx2) and am left with
(1/10)*(Cosx2)(Cosx)dx
Rewriting using trig indentities, I get
(1/10)*(1-Sinx2)(Cosx)dx
rewriting i get
(1/10)*(cosx-sinx2cosx)dx
I solve this integral and get
(1/10)sinx - (1/10)*((sinx)3/3) + C
but that is incorrect. The answer is supposed to be
(-1/20)cotx2-(1/10)ln(sinx)+C
What went wrong?