Question

cos A/1-sinA+ cosA/1+sinA=4​

Answer 1

Answer:

Step-by-step explanation:

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

cos A(1+sinA+1-sin A) /1-sin^2A=4

2cosA/cos^2 A=4

2/cos A=4

2 sec A=4

sec A=2

A=sec^-1 (2)