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

The arithmetic mean of the numbers 2s in2^0,4sin4^0,6sin^0, ddot, 178s in 178^0,180sin180^0 is sin1^0 b. "tan"1^0 c. cot1^0 d. t a n 89^0

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

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

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

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

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

Evaluate sin 1^@ sin 2^@ sin 3^@ ….sin 179^@ sin 180^@

sin ^ (2) 5 + sin ^ (2) 10 + sin ^ (2) 15 + ... + sin ^ (2) 180 =