Question

Find what is equal to 1 - cosA /sinA
A) sinA/1-CosA
B) SinA/ 1+cosA
C)cosA/1+CosA
D) CosA /1-CosA​

Answer 1

Step-by-step explanation:

as 1-cosA/sinA

Rationalise the numerator by 1+cosA

1-cosA x 1+cosA

sinA x 1+cosA

1*2-cos*2A

sinA+sinAcosA

sin*2A

sinA(1+cosA)

sin A

1+cosA

b is the correct answer