" (i) "(sin18^(@))/(cos72^(@))

Evaluate: (i) (sin 18^(@))/(cos 72^(@))

Evalute: (b) (sin18^(@))/(cos72^(@))

Evaluate : (sin 18^(@))/(cos72^(@))

Evaluate : (sin 18^(@))/(cos 72^(@))

Prove that (sin18^(@))/(cos72^(@))=1

Evaluate: (sin18^(@))/(cos72^(@))

(1) (sin18 ^ (@)) / (cos72 ^ (@)) (ii) (tan26 ^ (@)) / (cot64 ^ (@))

Prove that : (i) (sin 70^@)/(cos 20^@)+(cosec 20^@)/(sec 70^@)-2cos 70^@cosec 20^@=0 (ii) (cos 80^@)/(sin 10^@)+cos 59^@cosec 31^@=2 (iii) (2 sin 68^@)/(cos 22^@)-(2 cot 15^@)/(5 tan 75^@)-(3tan 45^@tan 20^@tan 40^@tan 50^@tan 70^@)/(5)=1 (iv) (sin 18^@)/(cos 72^@)+sqrt(3) (tan 10^@ tan 30^@tan 40^@tan 50^@tan 80^@)=2 (v) (7cos 55^@)/(3 sin 35^@)-(4(cos 70^@cosec 20^@))/(3(tan 5^@tan 25^@tan 45^@tan 65^@tan 856^@))=1

(sin 18^@)/( cos 72 ^@) = ?