" Trule "G" ,sec "12^(@)-(1)/(tan^(2)78^(@))=1

Prove that sec^(2)12^(@)-(1)/(tan^(2)78^(@))=1 .

sec ^ (2) 12 ^ (0) - (1) / (tan ^ (2) 78 ^ (@))

The value of sec^2 12^@-frac(1)(tan^2 78^@ is (A) 0 (B) 1 (C) 2 (D) 3

sec^(-1)((1+tan^(2)x)/(1-tan^(2)x))

sec^-1((1+tan ^2x)/(1-tan ^2 x))

sec^-1((1+tan ^2x)/(1-tan ^2 x))

sec ("tan"^(-1) y/2)=

tan 6 ^(@) tan 42 ^(@) tan 66 ^(@) tan 78^(@) =1

The value of tan6^(@)tan42^(@)tan66^(@)tan78^(@) is (a) 1 (b) (1)/(2)(c)(1)/(4)(d)(1)/(8)

What is the value of ( cosec (78^(@) - theta) - sec ( 12^(@) + theta) - tan (67^(@) + theta) + cot (23^(@) - theta) )/( tan 13^(@) tan 37^(@) tan 45^(@) tan 53^(@) tan 77^(@) ) ?