(119)/(125)quad (" vii ")(sec8 alpha-1)/(sec4 alpha-1)=(tan8 alpha)/(tan2 alpha)

Prove that, (sec 8 alpha -1)/(sec 4 alpha-1)= (tan 8 alpha)/(tan 2 alpha

If sec alpha=(5)/(4), evaluate (1-tan alpha)/(1+tan alpha)

(1)/(sec alpha - tan alpha ) - (1)/( cos alpha)=

tan2alpha-tanalpha(1+sec2alpha)=

If alpha_(1),alpha_(2),alpha_(3),...,alpha_(n) are in A.P whose common common difference is d then sin d[sec alpha_(1)sec alpha_(2)+sec alpha_(2)sec alpha_(3)+...+sec alpha_(n-1)sec alpha_(n)]=tan alpha_(n)-tan alpha_(1)

(1+sin alpha)/(1+cos alpha)*(1+sec alpha)/(1+cos ec alpha)=tan alpha

sec^(4)alpha(1-sin^(4)alpha)-2tan^(2)alpha=?

Prove that sin4 alpha=4tan alpha (1- tan^(2)alpha)/((1+tan^2 alpha)^2

Prove the following Identity: (tan alpha+sec alpha-1)/(tan alpha-sec alpha+1)=(1+sin alpha)/(cos alpha)