`c o s e c A+cotA=2/3` then cos A equals to

If 2sec^2A-sec^4A-2cos e c^2A+cos e c^4A=(15)/4,then tan A is equal

A+B+C=18 0^(@)=>C o s e c A[Sin B cos C+ cos B sin c]=

In a triangle ABC , if b^2 + c^2 = 3a^2 , then cotB + cotC-cotA is equal to

In a triangle ABC , if b^2 + c^2 = 3a^2 , then cotB + cotC-cotA is equal to

In a triangle ABC , if b^2 + c^2 = 3a^2 , then cotB + cotC-cotA is equal to

If A+B+C=180^0,\ then s e c A(cos B cos C-sin B sin C) is equal to:

If a_1,a_2,a_3,--- ,a_n are in A.P with common difference d (where d!=0 ) , then the sum of series. sind(cos e ca_1cos e ca_2+cos e ca_2cos e ca_3+ --+cos e ca_(n-1)cos e ca_n) is equal to cota_1-cota_n

If the angles of ∆ABC are in ratio 1:1:2, respectively (the largest angle being angle C), then the value of s e c A c o s e c B secAcosecB - t a n A c o t B tanAcotB is (a) 0 (b) 1/2 (c) 1 (d) √3/2

If cos e c^(-1)(cos e cx) and cos e c(cos e c^(-1)x) are equal functions, then the maximum range of value of x is

In a A B C , if r_1+r_3+r=r_2, then sec^2A+cos e c^2B is equal to 1-cos^2C (2) 2 1+cos e c^2C (4) 2-cot^2C