[(x)cos1^(@)cos2^(@)cos3^(@)...cos180^(@)=0],[((sin49^(@))/(10^(@)))^(2)+((cos41^(@))/(1.10^(@)))^(2)=2]

((sin49^(@))/(cos41^(@))-(cos17^(@))/(sin73^(@)))=?

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

Prove that : (i) tan 5^@tan 25^@ tan 30^@tan 65^@tan 85^@=(1)/(sqrt(3)) (ii) cot 12^@cot38^@cot 52^@cot60^@cot78^@=(1)/(sqrt(3)) (iii) cos 15^@cos 35^@cosec 55^@cos 60^@cosec 75^@=(1)/(2) (iv) cos 1^@cos 2^@cos 3^@.....cos 180^@=0 (v) ((sin 49^@)/(cos 41^@))^2+ ((cos 41^@)/(sin 49^@))^2=2

cos 1^(@)cos2^(@) cos3^(@) ..... cos 180^(@) .......

The value of cos1^(@)cos2^(@)cos3^(@)…cos180^(@) is

(1)/(2sin10^(@))-(sqrt(3))/(2cos10^(@))

The value of cos1^@cos2^@cos3^@....cos180^@ is

Find the value of ((cos1^(@)+sin1^(@))(cos2^(@)+sin2^(@))(cos3^(@)+sin3^(@))...(cos 45^@sin45^@))/( cos1^(@)cos2^(@)cos3^(@)...cos45^(@))

Find the value of ((cos1^(@)+sin1^(@))(cos2^(@)+sin2^(@))(cos3^(@)+sin3^(@))...(cos 45^@sin45^@))/( cos1^(@)cos2^(@)cos3^(@)...cos45^(@))