let `a_1,a_2,...a_n ` be in AP with common difference `pi/6`then find `seca_1seca_2+seca_2sec_3+...seca_(n-1)seca_n=k`,findk

let a_1,a_2,...a_n be in A.P. wth common difference pi/6 . if seca_1seca_2+seca_2seca_3+....seca_(n-1)seca_n = k(tana_n-tana_1) Find the value of k

let a_1,a_2,...a_n be in A.P. wth common difference pi/6 . If seca_1seca_2+seca_2seca_3+....seca_(n-1)seca_n = k(tana_n-tana_1). Find the value of k

let a_1,a_2,...a_n be in A.P. wth common difference pi/6. if seca_1seca_2+seca_2seca_3+....seca_(n-1)seca_n=k(tana_n-tana_1)Find the value of k

let a_1,a_2,...a_n be in A.P. wth common difference pi/6 . if seca_1seca_2+seca_2seca_3+....seca_(n-1)seca_n = k(tana_n-tana_1) Find the value of k

If a_1,a_2,…………..a_n are in AP with common difference d ne 0 then find (sin d) [sec a_1 sec a_2+ sec a_2 sec a_3+…….+sec a_(n-1) sec a_n]

If a_1, a_2, a_n are in A.P. with common difference d!=0 , then the sum of the series sind[seca_1seca_2+seca_2seca_3+....+s e ca_(n-1)seca_n] is : a. cos e ca_n-cos e ca b. cota_n-cota c. s e ca_n-s e ca d. t a na_n-t a na

If a_1, a_2, a_n are in A.P. with common difference d!=0 , then the sum of the series sind[seca_1seca_2+(sec)_2seca_3+....+s e ca_(n-1)(sec)_n] is : a.cos e ca_n-cos e ca b. cota_n-cota c. s e ca_n-s e ca d. t a na_n-t a na

If a_1, a_2, a_n are in A.P. with common difference d!=0 , then the sum of the series sind[seca_1seca_2+(sec)_2seca_3+....+s e ca_(n-1)(sec)_n] is : a. cos e ca_n-cos e ca b. cota_n-cota c. s e ca_n-s e ca d. t a na_n-t a na

If a_1,a_2,a_3,...,a_n are in AP and a_i ne (2k-1)pi/2 for all i , find the sum seca_1*seca_2+seca_2*seca_3+seca_3*seca_4+...+seca_(n-1)*seca_n .

secA(1-sinA)(secA+tanA)=1