`sinA/( 1+cosA) +sinA/(1−cosA)` is equal to

(1-cosA)/(sinA) is equal to ?

cosA/(1−sinA) =

(sinA+cosA)^2+(sinA-cosA)^2=

Prove the following identities: (cosA)/(1-sinA)+(sinA)/(1-cosA)+1 = (sinAcosA)/((1-sinA)(1-cosA) ((1+cotA+tanA)(sinA-cosA)/(sec^3A-cos e c^3A)=sin^2Acos^2A

If sinA, cosA and tanA are in G.P, the cos^(3)A+cos^(2)A is equal to :

Prove that : (i) (1-cosA)/(sinA)=(sinA)/(1+cosA) (ii) (costheta)/(1-sintheta)=(1+sintheta)/(costheta)

Prove that (cosA-sinA+1)/(cosA+sinA-1) =cosec A+ cot A using the identity cosec^(2)A=1+cot^(2)A .

The value of [(secA+tanA)(1-sinA)] is equal to (a) tan^2A(b)sin^2A (c) cosA (d) sinA

If sqrt((1-sinA)/(1+sinA))+(sinA)/(cosA)=(1)/(cosA), for all permissible values of A, then A belongs to (a) First Quadrant (b) Second Quadrant (c) Third Quadrant (d) Fourth Quadrant

Prove that a) (sin3A + sinA)sinA+(cos3A-cosA) cosA=0 b) cos20^(@)cos40^(@)cos80^(@)=1/8