[" 2.Without using trigonometric tables,ev "],[" (i) cot "34^(@)-tan56^(@)]

Without using trignometric tables,find tan75^@

Without using trigonometric tables, evaluate : (i) cos 48^@-sin42^@ (ii) cosec31^@-sec59^@ (iii) cot 34^@-tan56^@ (iv) cos^2 13^@-sin^2 77^@

Evalute (e ) cot34^(@)-tan56^(@)

Evaluate without using trigonometric tables : tan 20^(@) tan 40^(@) tan 50^(@) tan 70^(@)

Without using trigonometric tables, evaluate : (i) (cos 53^@)/(sin 37^@) (ii) (tan68^@)/(cot 22^@) (iii) (sec49^@)/(cosec 41^@) (iv) (sin 30^@17')/(cos 59^@43')

Without using trigonometric tables , prove that : (i) tan20^(@)tan40^(@) tan45^(@)tan50^(@)tan70^(@)=1 (ii) tan1^(@) tan2^(@)tan60^(@)tan88^(@)tan89^(@)=sqrt(3) (iii) cot5^(@)cot10^(@)cot30^(@)cot80^(@)cot85^(@)=sqrt(3) (iv) 4sin10^(@)sin20^(@)sin30^(@)sec70^(@)sec80^(@)=2

Without using trigonometric tables , prove that : (i) tan20^(@)tan40^(@) tan45^(@)tan50^(@)tan70^(@)=1 (ii) tan1^(@) tan2^(@)tan60^(@)tan88^(@)tan89^(@)=sqrt(3) (iii) cot5^(@)cot10^(@)cot30^(@)cot80^(@)cot85^(@)=sqrt(3) (iv) 4sin10^(@)sin20^(@)sin30^(@)sec70^(@)sec80^(@)=2

Without using trigonometric tables, evaluate. "sin"^(2)34^(@)+"sin"^(2)56^(@)+2" tan"18^(@)"tan"72^(@)-"cot"^(2)30^(@)

Evaluate without using trigonometric tables : tan 20.tan 40^(@) tan 50^(@) tan 70^(@)