निम्नलिखित को सिद्ध कीजिये- `(cos70^(@))/(sin20^(@))+(cos59^(@))/(sin31^(@))-8sin^2(30^@)=0`

(sec70^(@))/(csc20^(@))+(sin59^(@))/(cos31^(@))

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

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

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

(sin31^(@))/(2cos59^(@))=

(cos80^(@))/(sin10^(@))+cos59^(@)cos ec31^(@)=2

(sin30^(@)17)/(cos59^(@)43)

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

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)

(sin70^(@)+cos40^(@))/(cos70^(@)+sin40^(@))