" 20."sin^(2)x

20. If f(x)=sin^(2)x-cos^(2)x, Then find f((pi)/(12))

sin^(2)20+sin^(2)70 is equal to _________.

sin^(2)20^@+sin^(2)70^@-tan^2 45^@ =?

Electromagnetic wave in a medium of mu_(r) = 1 is given as E = 20 sin (20 x 10^10 - 20 x 10^2 x) . Dielectric constant of medium is 1/x then find x

An incident wave is represented by y(x,t)=20sin(2x-4t) . Write the expression for reflected wave (i) from a rigid boundary (ii) from an open boundary.

The value of the expression (tan^(2)20^(0)-sin^(2)20^(@))/(tan^(2)20^(0)+sin^(2)20^(@)) is

The value of (tan^(2)20^(@)-sin^(2)20^(@))/(tan^(2)20^(@).sin^(2)20^(@)) is

The value of (tan^(2)20^(@)-sin^(2)20^(@))/(tan^(2)20^(@).sin^(2)20^(@)) is