`sin36^@sin72^@sin108^@sin144^@=`

Prove that : sin 36^@ sin 72^@ sin 108^@ sin 144^@ =5/16 .

Prove that: sin36^0s in 72^0s in 108^0s in 144^0=5/(16)dot

sin18^@sin70^@+sin16^@sin36^@=

Prove that: "sin"(pi)/(5)"sin"(2pi)/(5)"sin"(3pi)/(5)"sin"(4pi)/(5)=(5)/(16) "sin"36^(@) "sin"72^(@) "sin"108^(@) sin 144^(@)=(5)/(16) .

Prove that: sin36^(@)s in72^(0)s in108^(0)s in144^(0)=(5)/(16)

Prove that (1)cos36^(@)cos72^(@)cos108^(@)cos144^(@)=(1)/(16)(2) Show that 4sin27^(@)=sqrt(5+sqrt(5))-sqrt(3-sqrt(5))

sin 36^(º)sin 72^(º) sin108^(º) sin 144^(º) =