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

sec70^(@)sin20^(@)+cos20^(@)cosec70^(@)=2

Without using trigonometric tables, prove that sec70^(@)sin 20^(@) + cos 20^(@) cosec 70^(@)=2 .

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

Prove that: sin65^(@)+cos65^(0)=sqrt(2)cos20^(@)

Prove that, sin65^(@)+cos65^(@)=sqrt(2)cos20^(@)

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

Prove that sin^(4)A"cosec"^(2)A+cos^(4)Asec^(2)A=1

Prove that : (cos80^(@))/(sin10^(@))+cos59^(@)cosec31^(@)=2

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