The number of ordered pair (a,b), where a,b E (-pi,pi),
\r\nsatisfying cos(a-b) = 1 and cos(a + b) = 1/e ,is.......
\r\n(E means 'belongs to')
\r\n
\r\npls explain.....
The number of ordered pair (a,b), where a,b E (-pi,pi),
\r\nsatisfying cos(a-b) = 1 and cos(a + b) = 1/e ,is.......
\r\n(E means 'belongs to')
\r\n\r\n
pls explain.....