`cos1^0cos2^0...cos179^0`

The value of the expression (2(sin1^(0)+sin2^(0)+sin3^(0)+...+sin89^(@)))/(2(cos1^(0)+cos2^(0)+...+cos44^(0))+1) equals

The value of cos1^(0)cos2^(0)cos3^(0)cos179^(@) is 1/sqrt(2) b.0 c.1 d.-1

Write the value of cos1^0+cos2^0+cos3^0++cos 180^0dot

cos1^(0)+cos2^(0)+cos3^(0)+ . . .+cos180^(0) =

Write the value of cos1^(0)+cos2^(0)+cos3^(0)++cos180^(@)

Prove that: tan10^0tan15^0tan75^0tan80^0=1 tan1^0tan2^0tan3^0.....tan89^0=1 cos1^0cos2^0cos3^0.......cos180^0=0

Prove that: tan10^0tan15^0tan75^0tan80^0=1 tan1^0tan2^0tan3^0tan89^0=1 cos1^0cos2^0cos3^0cos180^0=0

Prove that cos36^0cos72^0cos108^0cos144^0=1/(16)dot

Prove that cos36^0cos72^0cos108^0cos144^0=1/(16)dot