`tan15^(@) + tan 75^(@)=`

tan75^(@)

Using the identity tan A =(sin 2A)/(1+cos2A) find the value of tan 15^(@) and tan 75^(@) and hence solve that the equation sec^(2) theta= 4 tan theta .

Show that: tan 10^(@)tan 15^(@) tan 75^(@)tan 80^(@)=1

Show that : (i) tan 10^(@) tan 15^(@) tan 75^(@) tan 80^(@) = 1 (ii) sin 42^(@) sec 48^(@) + cos 42^(@) "cosec 48"^(@) = 2

tan 75^(@) - cot 75^(@)=

tan 75^(@)+ tan 15^(@)= A)1B)2C)3D)4

Show that tan 15^@ + tan 75^@ = 4

Find the values of tan 15^@ and tan 75^@