निम्नलिखित के मान बताइएः
`(a) sin 15^(@) " " (b) cos 15^(@) " " (c ) tan 22. (1^(@))/(2)`

(sin ^ (2) 15 ^ (@) - cos ^ (2) 15 ^ (@)) / (sin ^ (2) 15 ^ (@) + cos ^ (2) 15 ^ (@))

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

Calculate the value of (i) sin 15^(@) " "(ii) cos 15^(@)" "(iii) tan 15^(@) (iv) sin 75^(@) " "(v) cos 75^(@) " "(vi) tan 75^(@)

Calculate the value of (i) sin 15^(@) " "(ii) cos 15^(@)" "(iii) tan 15^(@) (iv) sin 75^(@) " "(v) cos 75^(@) " "(vi) tan 75^(@)

Evaluate : 2 sin 15 ^(@) cos 15 ^(@)

Show that cot ( A + 15^(@)) - tan (A - 15^(@)) = (4 cos 2 A)/(1 + 2 sin 2 A ) .

The value of (cos 15^(@) - sin 15^(@))/(cos 15^(@) + sin 15^(@) is

|["cos"15^(@), "sin"15^(@)], ["sin"15^(@), "cos"15^(@)]|=?

Prove that cos 15 ^(@) - sin 15^(@) = (1)/(sqrt2)

Prove that (i) " 2 cos " 45^(@) " cos " 15^(@)=((sqrt(3)+1))/(2) " "(ii) 2 " sin " 75^(@) " sin " 15^(@)=(1)/(2) (iii) " cos " 15^(@) - " sin " 15 =(1)/(sqrt(2))