सिद्ध कीजिए की:
` cot (A+ 15 ^(@)) - tan (A- 15^(@) ) = ( 4cos 2A)/( 1+2sin 2A) `

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

cot(A+15^(*))-tan(A-15^(*))-(4cos2A)/(1+2sin2A)

cot(theta+15^(@))-tan(theta-15^(@))=(4cos2 theta)/(1+2sin2 theta) prove that

Prove that, cot ( theta + 15^(@))- tan(theta - 15^(@))=(4 cos 2 theta)/(1+2 sin 2 theta)

Show that cot(A+15^(@))-tan(A-15^(@))=(4cos2A)/(1+2sin2A) deduce that cot15^(@)=2+sqrt(3)

Suppose that neither A-15^(@) nor A-75^(@) is an integral multiple of 180^(@) . Then prove that cot(15^(@)-A)+tan(15^(@)+A)=(4cos2A)/(1-2sin2A) and deduce that tan 15^@)=2-sqrt(3) .

sin cot ^ (- 1) cos tan ^ (- 1) 2

(cot^(2)15^(@)-1)/(cot^(2)15^(@)+1)=?

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

sin cot ^ (- 1) cos tan ^ (- 1) 2 =