[" Find the value of "],[2sin2^(@)+4sin u^(@)+6sin c^(@)+---180sin180^(@)]

sin 180^@=

Find the value of sin1^(@).sin2^(@).sin3^(@)…sin180^(@) .

sin 180^(@) sin 70^(@) + sin 16^(@) sin 36^(@)=

Prove that 2sin2^(@)+4sin4^(@)+6sin6^(@)+...+180sin180^(@)=90cot1^(@)

The arithmetic mean of the numbers 2sin2^(@), 4sin4^(@), 6 sin 6^(@), …………. 178 sin 178^(@), 180 sin 180^(@)

The arithmetic mean of the numbers 2sin2^(@), 4sin4^(@), 6 sin 6^(@), …………. 178 sin 178^(@), 180 sin 180^(@)

Prove that 2 sin 2^(@)+4sin 4^(@)+6sin 6^(@)+........+180sin 180^(@)=90 cot 1^(@) .

Prove that 2 sin 2^(@)+4sin 4^(@)+6sin 6^(@)+........+180sin 180^(@)=90 cot 10^(@) .