Prove the following:`sin20^@sin40^@sin80^@=sqrt3/8`

Similar Questions

Explore conceptually related problems

Prove the following: sin20^@sin40^@sin60^@sin80^@=3/16

Prove the following: tan20^@tan80^@cot50^@=sqrt3

Without using trignometric tables,prove the following: sin10^@+sin50^@-sin80^@+sin140^@=sqrt2sin25^@

Without using trignometric tables,prove the following: sin40^@-cos70^@=sqrt3cos80^@

Prove the following: sin47^@+sin61^@-sin11^@-sin25^@=cos7^@

Prove the following: sin18^@cos39^@+sin6^@cos15^@=sin24^@cos33^@

Prove the following: sin18^@=(frac(sqrt5-1)(4))

Prove the following: (frac(sin^2(-160^@))(sin^2 70^@))+(frac(sin(180^@-theta))(sintheta))=sec^2 20^@

Prove the following : sin^2 6x-sin^2 4x=sin2xsin10x

Prove the following: frac(cos15^@-sin15^@)(cos15^@+sin15^@)=1/sqrt3