4 - (1-sin^2 A)
so suspect another typo
4 + cos^2 A
4 + (1-sin^2 A)
5 - sin^2 A
The expression 4 - cos² A is equivalent to
1)5 - sec² A
2)5 - sin² A
3)5 + sin² A
4)5/sec² A
1 answer
1)5 - sec² A
2)5 - sin² A
3)5 + sin² A
4)5/sec² A
1 answer