" x."22." As alline for "(1)/(1-sin alpha)+(1)/(1+sin alpha)=(2)/(cos^(2)alpha)

if cos^(2)alpha-sin alpha=(1)/(n) then alpha

IF sin ^(16) alpha = 1/5 then the value of (1) /(cos ^2 alpha) +(1)/( 1 + sin ^2 alpha) +(2)/(1+ sin ^4 alpha) + ( 4 )/( 1+ sin ^8 alpha) is equal to

(sin alpha)/(1+cos alpha)+(1+cos alpha)/(sin alpha)=2cosec alpha

If pi

If sin^(16) alpha = (1)/(5) , then the value of (1)/( cos^(2) alpha) + (1)/( 1 + sin^(2) alpha) + (2)/( 1 + sin^(4) alpha) + (4)/( 1 + sin^(8) alpha) is

Givent that (pi)/(2)

(1-2sin^(2)alpha)/(1+sin2 alpha)=(1-tan alpha)/(1+tan alpha)

(1-2sin^(2)alpha)/(1+sin2 alpha)=(1-tan alpha)/(1+tan alpha)

If cos y=x cos(alpha-y) then (1+x^(2)-2x cos alpha)*(dy)/(dx) is (A) sin alpha (B) -sin alpha (C) cos alpha (D) -cos alpha

The value of the integral int_(0)^(1)(dx)/(x^(2)+2x cos alpha+1) is equal to (a)sin alpha(b)alpha sin alpha(c)(alpha)/(2sin alpha)(d)(alpha)/(2)sin alpha