The value of `(sin(-660^@)tan(1050^@)sec(420^@))/(cos(225^@)cosec(315^@)cos(510^@))` is:

The value of (sin(-660^(@))tan(1050^(@))sec(420^(@)))/(cos(225^(@))cos ec(315^(@))cos(510^(@)))is :

The value of (sin300^(@).tan330^(@).sec420^(@))/(tan135^(@).sin210^(@).sec315^(@)) is

The value of (sin300^(@).tan330^(@).sec420^(@))/(tan135^(@).sin210^(@).sec315^(@)) is

The value of (sin300^(@).tan330^(@).sec420^(@))/(tan135^(@).sin210^(@).sec315^(@)) is

(a)Find the exact value of (sin 300^@tan 330^@ sec (-420^@) )/(cot 135^@ cos 210^@ cosec 315^@ )

Find the value of (sin30^(@).tan330^(@).sec420^(@))/(tan135^(@).sin135^(@).sin210^(@)sec315^(@))

Find the value of (sin30^(@).tan330^(@).sec420^(@))/(tan135^(@).sin135^(@).sin210^(@)sec315^(@))

Find the value of (sin 25^@)/(sec65^@)+(cos 25^@)/(cosec 65^@) .

The value of (sin 20^(@)cos70^(@)+ cos20^(@)sin70^(@))/(sin23^(@)"cosec"23^(@)+cos23^(@)sec23^(@)) is _________.

Find the value of (sin 50^(@))/(cos40^(@))+("cosec"40^(@))/(sec 50^(@))-4cos 50^(@) " cosec"40^(@).