Which pythagorean identity is correct?

A. sin^2 (theta) + 1=cos^2 (theta)

B. tan^2 (theta) + 1=sec^2 (theta)

C. 1-cot^2 (theta) = csc^2 (theta)

D. 1-cos^2 (theta) = tan^2 (theta)

Answer: B

Step-by-step explanation: Just did it!

The pythagorean identity that is correct is option B:

B. tan^2 (theta) + 1=sec^2 (theta)

Step-by-step explanation:

The pythagorean identities are:

1.) sin^2 (theta) + cos^2 (theta) = 1

2.) tan^2 (theta) + 1 = sec^2 (theta)

3.) 1 + cot^2 (theta) = csc^2 (theta)

Then the pythagorean identity that is correct is option B:

B. tan^2 (theta) + 1=sec^2 (theta)