Question

SinB
- sind o
Icood
Expanding along Ri
"sing o
determinantlo​

Answer 1

Converting, cot into cossin form, we get, ⇒Δ=[ sin2A(sin(C-B)sinB⋅sinC)+sin2B(sin(A-C)sin C⋅sinA)+sin2C(sin(B-A)sinB⋅sinA)]