" 18.Using properties of definite integral,prove that "int_(0)^( pi)(x*tan x)/(sec x cos ecx)dx=(pi^(2))/(4)

int_(0)^( pi)x(tan x)/(sec x+cos x)dx=(pi^(2))/(4)

int_(0)^(pi) (tan x)/(sec x + cos x) dx=

Using properties of definite integrals,prove the following : int_(o)^( pi)(x tan x)/(sec x csc x)dx=(pi^(2))/(4)

int_ (0) ^ (pi) (x tan x) / (sec x cos ecx) = (pi ^ (2)) / (4)

Using the properties of the definite integral, prove that int_0^(pi/2)(sin xdx)/(sin x + cos x)=pi/4

Using properties of definite integrals, prove the following : int_o^pi(xtanx)/(secx\ cos e c\ x)\ dx=(pi^2)/4

Using properties of definite integrals,evaluate int_(0)^( pi)(xdx)/(4-cos^(2)x)

int_(0)^( pi)(x tan x)/(tan x+sec x)*dx=(pi(pi-2))/(2)

int_(0)^( pi)(x sec x tan x)/(1+sec^(2)x)dx=(pi^(2))/(4)

Evaluate the definite integrals int_(0)^( pi)(x tan x)/(sec x+tan x)dx