`cos e c(360^0)/7+cos e c(540^0)/7=` `cos e c(180^0)/7` (b) `cos e c(90^0)/7` `sec(180^0)/7` (d) `sec(90^0)/7`

cos e c(360^0)/7+cos e c(540^0)/7= (a) cosec(180^0)/7 ,(b) cosec(90^0)/7 , (c) sec(180^0)/7 , (d) sec(90^0)/7

csc(360^(@))/(7)+csc(540^(@))/(7)=csc(180^(@))/(7) (b) csc(90^(@))/(7)sec(180^(@))/(7)(d)sec(90^(@))/(7)

The value of cos e c10^0+cos e c50^0-cos e c70^0 is ____

The value of cos e c10^0+cos e c50^0-cos e c70^0 is ____

The value of cos e c10^0+cos e c50^0-cos e c70^0 is ____

Evaluate : (sin50^0)/(cos40^0)+(cos e c40^0)/(sec50^0)-4cos50^0cos e c40^0

Evaluate : (sin50^0)/(cos40^0)+(cos e c40^0)/(sec50^0)-4cos50^0cos e c40^0

Prove: (cos e c\ A)/(cos e c\ A-1)+(cos e c\ A)/(cos e c\ A+1)=2sec^2A

If cos ec(360^(@))/(7)+cos ec(540^(@))/(7)=csc theta where theta in(0,90^(@)), then theta

Prove that: (cos e c(90^0+theta)+cot(450^0+theta))/(cos e c(90^0-theta)+t a n(180^0-theta))+(t a n(180^0+theta)+s e c(180^0-theta))/(t a n(360^0+theta)-s e c(-theta)) =2