[" Without using trigonometric tables,evaluate each of the following: "],[[" (i) "sin^(2)65^(@)+sin^(2)25^(@)," (ii) "cos^(2)17^(@)-sin^(2)73^(@)],[" (iii) "csc^(2)67^(@)-tan^(2)23^(@),(iv)sec^(2)36^(@)-cot^(2)54^(@)]]

Without using trigonometric tables, evaluate each of the following : (i) sin^2 65^@+sin^2 25^@ (ii) cos^2 17^@- sin^2 73^@ (iii) cosec ^2 67^@-tan^223^@ (iv) sec^2 36^@-cot ^2 54^@ .

Without using trigonometric tables,evaluate each of the following: (sec^(2)54^(0)-cot^(2)36^(@))/(cos ec^(2)57^(0)-tan^(2)33^(0))+2sin^(2)38^(@)sec^(2)52^(0)-sin^(2)45^(@)

Without using trigonometric table, evaluate the following: (sin ^(2) 25 ^(@) + sin ^(2) 65^(@))+sqret3 (tan 5 ^(@). Tan15^(@).tan30^(@).tan75^(@).tan85^(@))

Without using trigonometric table,evaluate the following: (cos ec^(2)(90-theta)-tan^(2)theta)/(4(cos^(2)48^(@)+cos^(2)42^(@)))-(2tan^(2)30^(@)sec^(2)52^(@)sin^(2)38^(@))/(cos ec^(2)70^(@)-tan^(2)20^(@))

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

Without using trigonometric tables,evaluate each of the following: (sec39^(0))/(cos ec51^(0))+(2)/(sqrt(3))tan17^(0)tan38^(@)tan60^(@)tan52^(@)tan73^(@)-3(sin^(2)31^(0)+sin^(2)59^(@))

Without using Trigonometric Tables evaluate the following :- (cosec^2 67^@-tan^2 23^@)/(sin^2 17^@+sin^2 73^@)+(sin59^@)/(cos31^@) .

Without using Trigonometric Tables evaluate the following :- (2cos38^@)/(sin52^@)+(4tan40^@)/(cot50^@)+(12sec66^@)/(cosec24^@)

Without using trigonometric tables , prove that : (i) sin50^(@)-cos40^(@)=0 (ii) tan36^(@)-cot54^(@)=0 (iii) sec25^(@)-"cosec "65^(@)=0 (iv) sin^(2)32^(@)+sin^(2)58^(@)=1 (v) "cosec"^(2)39^(@)-tan^(2)51^(@)=1 (vi) sec^(2)10^(@)-cot^(2)80^(@)=1