" (3) Prove that "(sin70)/(cos20)+(cosec20)/(sec70)-2cos70times cosec20=0

Prove that: (sin70o)/(cos20o)+(cos ec20o)/(sec70o)-2cos700cos ec20o=0

Prove that: (sin70^@)/(cos20^@)+(cos e c\ 20^@)/(sec70^@)-2cos70^@\ cos e c\ 20^@=0

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

(sin70^(@))/(cos20^(@))+(csc20^(@))/(sec70^(@))-2cos70^(@)csc20^(@)=0

Evaluate : (sin70^@)/(cos 20^@)+(cosec36^@)/(sec54^@)-(2cos43^@cosec47^@)/(tan10^@tan40^@tan50^@tan80^@ .

Prove that : sec (70^(@) - 0) = cosec (20^(@) + 0)

Prove that : "cosec "65^(@)cos25^(@)+"cosec20"^(@)cos70^(@)=2

Prove that : "cosec "65^(@)cos25^(@)+"cosec20"^(@)cos70^(@)=2

Prove that (sin70^(@)-cos40^(@))/(cos50^(@)-sin20^(@)) = 1/(sqrt(3)) .

Prove that : sin70^@ cos 10^@- cos70^@ sin 10^@= sqrt3/2 .