" Sec70.Sineo-coseo.Cosec70"

Without using Trigonometric Tables evaluate the following :- sec70^@sin20^@-cos20^@cosec70^@ .

The value of sec70^@sin20^@+cos20^@cosec70^@ is

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

The value of sec70^@*sin20^@+cos20^@*cosec70^@ = ……………

sec 70^@.sin 20^@ - cos70^@.cosec 20^@

Prove that: (i) cos55^(@)sin 35^(@)+sin 55^(@)cos 35^(@)=1 (ii) (tan 72^(@))/(cot 18^(@))-(cot 72^(@))/(tan18^(@))=0 (iii) sec70^(@)sin 20^(@)+cosec 70^(@)cos 20^(@)=2

The value of sec 70^@.sin 20^@ + cos 20^@.cosec 70^@ =………..

The value of "cosec"10^(@)+"cosec"50^(@)-"cosec"70^(@) is _____

The value of of cosec 10^(@) + cosec 50^(@) -cosec 70^(@) is "_______"