If `alpha_1, alpha_2, alpha_3, ..., alpha_n` are in A.P whose common difference is `d` then `sind[secalpha_1 sec alpha_2+sec alpha_2 sec alpha_3+...+sec alpha_(n-1) sec alpha_(n)]=tan alpha_n-tan alpha_1`

If alpha_1 , alpha_2, ......, alpha_n are in A.P, whose common difference is d , show that 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

(sec8 alpha-1)/(sec4 alpha-1)=(tan8 alpha)/(tan2 alpha)

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

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

If alpha = 2pi/7 prove that sec alpha + sec 2alpha + sec 3alpha = -4 .

If 2sec^2 alpha- sec^4 alpha-2 cosec^2 alpha+cosec^4 alpha=15/4 then tan alpha=

If 2sec^2 alpha- sec^4 alpha-2 cosec^2 alpha+cosec^4 alpha=15/4 then tan alpha=

If 2sec^2 alpha- sec^4 alpha-2 cosec^2 alpha+cosec^4 alpha=15/4 then tan alpha=

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