" 3.(a) "tan75^(@)

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^(@)

tan 75 ^(@) - tan 30^(@)- tan 75^(@) tan 30^(@) =1.

Show that: tan 10^(@)tan 15^(@) tan 75^(@)tan 80^(@)=1

Prove that: "tan"A+cotA=2"cosec" 2A and deduce that "tan" 75^(@)+cot 75^(@)=4 .

Show that tan 75^(@) = (sqrt3) +(1 )/( sqrt3 -1) = 2 + sqrt3. Hence deduce that tan 75^(@) - cot 75^(@) = 4 sin 60^(@).

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

Prove that: tan75^(@)+cot75^(0)=4

Show that tan75^(@)+cot75^(0)=4