[" 24.या "B=30^(@)" So please कि."],[qquad (1)((1-cos B)(1+cos B))/((1-sin B)(1+sin B))=(1)/(3)]

Show that (1+sin A)/(cos A)+(cos B)/(1-sin B)=(2sin A-2sin B)/(sin(A-B)+cos A-cos B)

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

If A +B = 90 , prove that (cos A + cos B)/(sin A+ sinB)=1 .

Show that (1+ sin A)/(cosA)+( cos B)/(1- sin B)=(2 (sin A- sin B))/(sin (A-B)+ cos A-cos B)

If sin (A+B)= cos (A-B) = 1 , then

If cos(A-B)=(3)/(5) andtan Atan B=2, then cos A cos B=(1)/(5)(b)sin A sin B=-(2)/(5)cos A cos B=-(1)/(5)(d)sin A sin B=-(1)/(5)

If (frac(cos^4 B)(cos^2 A))+(frac(sin^4 B)(sin^2 A))=1 then show that, (frac(cos^4 A)(cos^2 B))+(frac(sin^4 B)(sin^2 A))=1

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)=

If tan A=1 and tan B=sqrt(3), evaluate cos A cos B-sin A sin B

Prove that (1 + sin A) / (cos A) + (cos B) / (1-sin B) = (2sin A-2sin B) / (sin (AB) + cos A-cos B)