1.

For alpha = pi //7 which of the following hold (s) good ?

Answer»

`TAN ALPHA tan 2 alpha 3 alpha = tan 3 alpha - tan 2 alpha - tan alpha `
`cos ec alpha = cos ec 2 alpha + cos ec 4 alpha `
`cos alpha - cos 2 alpha + cos 3 alpha = 1//2`
`8 cos alpha cos 2alpha cos 4alpha =1`

Answer :A::B::C


Discussion

No Comment Found