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Show that : tan 48^(@) tan 16^(@) tan...

Show that :
`tan 48^(@) tan 16^(@) tan 42^(@) tan 74^(@) = 1`.

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Show that tan 48^(@) tan 16^(@) tan42^(@) tan 74^(@) =1

tan 20^(@) tan 40^(@) tan 60^(@) tan 80^@=

tan 203^(@) + tan 22^(@) + tan 203^(@) tan 22^(@) =

tan 9^(@) - tan 27^(@) - tan 63^(@) + tan 81^(@) =

tan 75^(@) - tan 30^@ - tan 75^(@) * tan 30^*(@) =

Prove that tan A. (tan 60^(@) +A). Tan (60^(@)-A)=tan 3A and hence find the value of tan 6^(@) tan 42^(@) tan 66^(@) tan 78^(@) .

(i) If tan 20^(@) = lambda then show that (tan 610^(@) + tan 700^(@))/(tan 560^(@) - tan 470^(@))=(1-lambda^(2))/(1+lambda^(2))

tan10^(@) tan 20^(@) tan 30^(@) tan 40^(@) tan 50^(@) tan 60^(@) tan 70^(@) tan 80^(@)=