`Sin 40^@ 35' cos 19^@ 25' + cos 40^@ 35' sin 19^@ 25'` is equal to

sin(40^@25')cos(19^@35')+cos(40^@25')sin(19^@35')=

(cos20^(@)35')/(sin69^(@)25') is

cos5^@-sin25^@ is equal to

cos 5^(@) - sin 25^(@) is equal to

cos 5^(@) - sin 25^(@) is equal to

The smallest positive value of x (in degrees) for whichcos tanx=(cos5^@ cos 20^@ + cos 35^@ cos 50^@-sin 50^@ sin 20^@ - sin35^@ sin50^@)/(sin5^@ cos 20^@ - sin 35^@ cos 50^@ + cos 5^@ sin 20^@ - cos 35^@ sin 50^@) is equal to

The smallest positive value of x (in degrees) for whichcos tanx=(cos5^@ cos 20^@ + cos 35^@ cos 50^@-sin 50^@ sin 20^@ - sin35^@ sin50^@)/(sin5^@ cos 20^@ - sin 35^@ cos 50^@ + cos 5^@ sin 20^@ - cos 35^@ sin 50^@) is equal to

(sin 70^(@) + cos 40^(@))/(cos 70^(@) + sin 40^(@)) =

cos (40^@ + theta) - sin (50^@ - theta) is equal to