[" 7."sin67^(@)+cos75^(@)" and "0^(@)" antit "45^(@)" an a "],[" anforty "]

cos 45^(@)-sin 45^(@)=?

Find the values of sin75^(@), cos75^(@), tan75^(@) and cot75^(@) .

( sin 75^(@) - sin 15^(@))/( cos 15^(@) - cos 75^(@))=

Evaluate: sin 15^(@)cos 15^(@)-cos 75^(@)sin75^(@)

Evaluate : sin 75^@, cos 75^@, tan 75^@ .

Computer sin 75^(@) , cos 75^(@) and tan 15 ^(@), from the functions of 30^(@) and 45 ^(@)

sin 45^(@)(cos 45^(@)) =…………..

The value of ("sin"23^(@)"cos"67^(@)"tan"45^(@)+"cos"23^(@)"sin"67^(@)"cot"45^(@))/(2"sin"45^(@)"cos"45^(@)) is:

Prove that (i) " sin " 80^(@) "cos " 20^(@) - " cos " 80^(@) " sin " 20^(@) =(sqrt(3))/(2) (ii) " cos " 45^(@) " cos " 15^(@) - " sin " 45^(@) " sin " 15^(@) = (1)/(2) (iii) " cos " 75^(@) " cos " 15^(@) + " sin " 75^(@) " sin " 15^(2)= (1)/(2) (iv) " sin " 40^(@) " cos " 20^(@) " + cos " 40^(@) " sin " 20^(@) =(sqrt(3))/(2) (v) " cos " 130^(@) " cos " 40^(@) l + " sin " 130^(@) " sin " 40^(@) =0