Question

1]
Show that
tan A. sin A+cos A = sec A
D Dand​

Answer 1

Answer:

tan A.sin A+cosA = sec A

L.H.S

sinA.sinA/cosA+cosA

sin²A+cos²A/cosA

since,sin²A+cos²A =1 (by trigonometric identities)

therefore, 1/cosA= secA

L.H.S = R.H.S

hence proved