(cos13+sin13)/(cos13-sin13)-(tan A)/(1)

Prove that : (cos13^@+sin13^@)/(cos13^@-sin13^@) =tan 58^@ .

(Cos13-Sin13)/(Cos13+Sin13)+(1)/(Cot148^@)=

If ( cos 13^(@)+sin13^(@))/(cos13^(@)-sin13^(@))=tan A , then A=_________

If (cos13^(0)-sin13^(0))/(cos13^(0)+sin13^(0))+(1)/(cot148^(0))=k, then (k^(2))/(16) is equal to "

Prove that:(i) "tan"69^(@)+"tan"66^(@)+1="tan"69^(@) "tan"66^(@) (ii) (cos13^(@)+"sin"13^(@))/(cos13^(@)-"sin"13^(@))="tan"58^(@)

cos(sin^(-1)(5/13))=

" The value of ((sin17^(@))(cos13^(@))+(cos17^(@))(sin13^(@)))/((cos23^(@))(cos37^(@))-(sin157^(@))(sin37^(@))) is equal to