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[" 2.Gells a: "],[[" (i) "tan48^(@)tan23...

[" 2.Gells a: "],[[" (i) "tan48^(@)tan23^(@)tan42^(@)tan67^(@)=1],[" (ii) "cos38^(@)cos52^(@)-sin38^(@)sin52^(@)=0]]

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Show that : cos38^(@)cos52^(@)-sin38^(@)sin52^(@)=0

Shown that : tan48^(@)tan23^(@)tan42^(@)tan67^(@)=1

Shown that : tan48^(@)tan23^(@)tan42^(@)tan67^(@)=1

Show that : tan48^(@)tan23^(@)tan42^(@)tan67^(@)=1

Show that:(i) tan48^@tan23^@tan42^@tan67^@=1

show that tan48^(@).tan23^(@)*tan42^(@)*tan67^(@)=1

Show that tan48^(@)tan16^(@)tan42^(@)tan74^(@)=1

Show that : tan48^@tan23^@tan42^@tan67^@=1 .