Question

if (1+cos A)(1-sinA)=3/4, find sec A​

Answer 1

Answer:

(1+ cos A)(1- cos A)=3/4

1^2-cos^2 A=3/4

1-cos^2 A=3/4

sin^2 A=3/4

sin A= root3/2

but sin 60=root3/2

so

A=60

sec 60 = 2

so sec 60 = 2

Step-by-step explanation: