[" (iv) "tan75^(@)+cot75^(@)],[" (v) "cos15^(@)-sin15^(@)]

cos15^(@)-cos75^(@)=

tan15^(@) + tan 75^(@)=

cot 15^(@) + cot 75^(@) + cot 315^(@) =

Cos15^(@) - Cos75^(@) =

Which of the following number(s) is/are rational? (A) sin15^(@) (B) cos15^(@) (C) sin15^(@)cos15^(@)(D)sin15^(@)cos75^(@)

Which of the following number (s) is/are rational number? (A) sin15^(@) (B) cos15^(@) (C) sin15^(@)cos15^(@)(D)sin15^(@)cos75^(@)

The value of tan75^(@)-cot75^(@) is

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^(@)

Prove that, cos105^(@)+cos15^(@)=sin75^(@)-sin15^(@)