(sin70^(@))/(cos20^(@))+(cosec20^(@))/(sec70^(@))-2cos70^(@)cosec20^(@)" is equal to "

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

cos^(2)20^(@)+cos^(2)70^(@) is equal to :

Evalute (g) sec70^(@)sin20^(@)-cos70^(@)cosec20^(@)

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

sec70^(@)sin20^(@)+cos20^(@)"cosec"70^(@)=?

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

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

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