Which one of the following is not a Pythagorean identity? a)

Last updated: 7/30/2022

Which one of the following is not a Pythagorean identity? a) They are all Pythagorean identities b) 1- cot² (θ) = csc²(θ) c) tan² (θ) + 1 = sec² (θ ) d) sin² (θ ) + cos² (θ ) = 1