Prove that `(cos70^@/sin20^@)+(cos59^@/sin31^@) - 8cos^2 60^@=0`

(cos70^(@))/(sin20^(@))+(cos59^(@))/(sin31^(@))=8sin^(2)30^(@)

Prove that: (cos80^@)/(sin10^@)+cos59^@\ cosec\ 31^@=2

Prove that : (cos80^(@))/(sin10^(@))+cos59^(@)cosec31^(@)=2

Evaluate : (cos 70^(@))/(sin 20^(@))+(cos 59^(@))/(sin31^(@))-8sin^(2)30^(@)

Evaluate : (cos 70^(@))/(sin 20^(@))+(cos 59^(@))/(sin31^(@))-8sin^(2)30^(@)

Evaluate : (i) 3 cos 80^(@) "cosec 10"^(@) + 2 sin 59^(@) sec 31^(@) (ii) (cos 70^(@))/(sin 20^(@)) + (cos 59^(@))/(sin 31^(@)) - 8 sin^(2) 30^(@) (iii) "cosec" (65^(@) + A) - sec(25^(@) - A)

Prove that: (i) sin35 sin55-cos35 cos55=0 (ii) (cos70)/(sin20)+(cos59)/(sin31)-8sin^2 30=0

(cos 70^(@))/(sin 20^(@)) + (cos 59^(@))/(sin 31^(@) ) - 8 sin^(2) 30^(@) is equal to

Evaluate : (cos80^@)/(sin10^@)+cos59^@ cosec31^@ .

Prove that cos32^(@) sin20^(@) + cos144^(@) cos2^(@) + sin68^(@) cos56^(@) = 0