alpha=(pi)/(31)," then the value of "(1)/(4)[(1)/(cos alpha)+(2cos alpha)/(cos2 alpha)+(4cos3 alpha)/(cos4 alpha)+(8cos7 alpha)/(cos8 alpha)]=

If alpha=(pi)/(31) then find the value of (1)/(4)[(1)/(cos alpha)+(2cos alpha)/(cos2 alpha)+(4cos3 alpha)/(cos4 alpha)+(8cos7 alpha)/(cos8 alpha)]

If alpha=(pi)/(17), then the value of (sin21 alpha-sin alpha)/(sin16 alpha+sin4 alpha) is equal to

If alpha=(pi)/(8) , what is the value of cosalphacos2alphacos4alpha ?

If alpha+beta=(pi)/(4) , then the value of (1+tanalpha)(1+tanbeta) is

If alpha+dot(beta)=(pi)/(4), then the value of (1+tan alpha)(1+tan beta)

If alpha in [(pi)/(2),pi] then the value of sqrt(1+ sin alpha)-sqrt(1 - sin alpha) is equal to

If alpha in(-(3 pi)/(2),-pi), then the value of tan^(-1)(cot alpha)-cot^(-1)(tan alpha)+sin^(-1)(sin alpha)+cos^(-1)(cot alpha) is equal to (a)2 pi+alpha(b)pi+alpha(c)0(d)pi-alpha

Find the value of (i) "sec" (-(31 pi)/(4))

If alpha in (-(3pi)/2,-pi) , then the value of tan^(-1)(cot alpha)-cot^(-1)(tan alpha)+sin^(-1)(sin alpha)+cos^(-1)(cos alpha) is equal to

If alpha+beta=(pi)/(4) then value of (1=tanalpha).(1+tanbeta) is