If a + b is equal to 90 degree and secant a is equal to 5 by 3 then find the value of cos b

If a + b is equal to 90 degree and secant a is equal to 5 by 3 then fi

1.	If a + b is equal to 90 degree and secant a is equal to 5 by 3 then find the value of cos b
Answer» 4/5