Final answer:
The antiderivative of sec²(x) is tan(x) + C.
Step-by-step explanation:
The antiderivative of sec²(x) is tan(x) + C.
To find the antiderivative, you can use the trigonometric identity:
sec²(x) = 1 + tan²(x)
So, the antiderivative of sec²(x) is the antiderivative of (1 + tan²(x)). The antiderivative of 1 is x, and the antiderivative of tan²(x) is tan(x). Therefore, the antiderivative of sec²(x) is tan(x) + C, where C is the constant of integration.