*15.(2cos67^(@))/(sin23^(@))-(tan40^(@))/(cot50^(@))-cos0^(@)=......

(cot50^(@))/(tan40^(@))

Without using Trigonometric tables, evaluate:- 2(cos67^@)/(sin23^@)-(tan 40^@)/(cot50^@)-sin90^@ .

Without using Trigonometric Tables evaluate the following :- (2cos67^@)/(sin23^@)-(tan40^@)/(cot50^@)-cos0^@+tan15^@tan25^@tan60^@tan65^@tan75^@ .

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

Find the value of 3(tan67^(@))/(cot23^(@))+(sin42^(@))/(2cos48^(@))+(5cosec61^(@))/(2sec29^(@))

|{:(sin40^@,-cos40^@),(sin50^@,cos50^@):}|=.......

Evaluate the following: (i) ((sin35)/(cos55))^2+((cos55)/(sin35))^2-2cos60 (ii) (2cos67)/(sin23)-(tan40)/(cot50)-cos0

Evaluate the following: ( i )((sin35o)/(cos55o))^(2)+((cos55o)/(sin35o))^(2)-2cos60o( ii) (2cos67o)/(sin23o)-(tan40o)/(cot50o)-cos0o

(2sin68^(@))/(cos22^(@))-(2cot15^(@))/(5tan75^(@))-(3tan45^(@).tan20^(@).tan40^(@).tan50^(@).tan70^(@))/(5) is equal to