If (cos theta_(1))/(cos theta_(2))+(sin theta_(1))/(sin theta_(2))=(cos theta_(0))/(cos theta_(2...

If (cos theta_(1),sin theta_(1)),B(cos theta_(2),sin theta_(2)) and C(cos theta_(3),sin theta_(3)) then orthocenter of Delta ABC is

IF A(cos theta_(1),sin theta_(1)),B(cos theta_(2),sin theta_(2))&C(cos theta_(3),sin theta_(3)), then Orthocenter of Delta ABC is

If (a cos theta_(1),a sin theta_(1)),(a cos theta_(2),a sin theta_(2)) and (a cos theta_(3),a sin theta_(3)) represent the vertices of an equilateral triangle inscribed in a circle,then (a)cos theta_(1)+cos theta_(2)+cos theta_(3)=0 (b) sin theta_(1)+sin theta_(2)+sin theta_(3)=0(c)tan theta_(1)+tan theta_(2)+tan theta_(3)=0(d)cot theta_(1)+cot theta_(2)+cot theta_(3)=0

If theta_(1),theta_(2),theta_(3)....,theta_(n) are in A.P. then (sin theta_(1)+sin theta_(2)+...+sin theta_(n))/(cos theta_(1)+cos theta_(2)+...+cos theta_(n))=

If cos theta_(1)+cos theta_(2)+cos theta_(3)+cos theta_(4)+cos theta_(5)=5 then , sin theta_(1)+sin theta_(2)+sin theta_(3)+sin theta_(4)+sin theta_(5)=

(sin theta_ (1) + i cos theta_ (1)) (cos theta_ (2) + i sin theta_ (2)) ...... (sin theta_ (n) + i cos theta_ (n)) = a + ib, a ^ (2) + b ^ (2) =

If sin theta_(1)+sin theta_(2)+sin theta_(3)=3, then cos theta_(1)+cos theta_(2)+cos theta_(3) is equal to 3(b)2(c)1(d)0

(cos^(2)theta(1-cos theta))/(sin^(2)theta(1-sin theta))=(1+sin theta)/(1+cos theta)

prove that (cos theta)/(1-sin theta)+(cos theta)/(1+sin theta)=(2)/(cos theta)

(1+cos theta+sin theta)/(1+cos theta-sin theta)=(1+sin theta)/(cos theta)