Posted by Moe on .
The expression 4  cos² A is equivalent to
1)5  sec² A
2)5  sin² A
3)5 + sin² A
4)5/sec² A

Algebra 2/ Trigonometry 
Damon,
4  (1sin^2 A)
so suspect another typo
4 + cos^2 A
4 + (1sin^2 A)
5  sin^2 A