If, `Delta ABC` is right angled at C, then : `tanAtanB` = ....

In Delta ABC ,right angled at C, then tanA + tanB =

if in triangle ABC right angled at C then tan A+tan B

If Delta ABC is right angled at C, then find the value of cos (A + B)

If Delta ABC is right-angled at C, then c-c.sin A tan((A)/(2))=...

In a triangle ABC,right angled at B, then

If Delta ABC is right angled at B then what is the value of sin(A+C)

In the adjacent figure, Delta ABC is right angled at C and DE bot AB . Prove that Delta ABC ~ Delta ADE and hence find the lengths of AE and DE ?

If triangle ABC is right angled at C, then the value of sec (A+B) is

If triangle ABC is right angled at C, then the value of sec (A+B) is