[[(a),0,,(b),1,,(c)-1,],[1,,((sin A)/((1+cos A)),(tan A)/((1-cos A))]]=?

(sin A)/(sec A+tan A-1)+(cos A)/(cos ecA+cot A-1)=1

tan ""A/2 is equal to.............. A) sqrt((1- sin A)/( 1+ sin A)) B) sqrt((1+ sin A)/(1- sin A)) C) sqrt((1 -cos A)/(1 + cos A)) D) sqrt((1 +cos A)/(1- cos A))

If tan A=(x sin B)/(1-cos B)tan B=(y sin A)/(1-y cos A) then (x)/(y)=

If quad tan A=(x sin B)/(1-x cos B) and tan B=(y sin A)/(1-y cos A) then (sin A)/(sin B)=

Show that (cos A)/(1-tan A)+(sin A)/(1-cot A)=sin A +cos A

(cos A) / (1-tan A) + (sin A) / (1-cot A) = sin A + cos A

(1) ((1-cos B)(1+cos B))/((1-sin B)(1+sin B))=(1)/(3)

If tan A=(x sin B)/(1- x cos B) and tan B=(y sin A)/(1-y cos A) then (sin A )/(sin B)=

tan (sin ^(-1)x+sin ^(-1) y) +tan (cos^(-1)x+cos ^(-1)y)

Prove that : (tan A + (1)/ (cos A))^(2) + (tan A - (1)/ (cos A))^(2) = 2 ((1 + sin^(2) A)/ (1 - sin^(2) A))