So, 7π/8 + 5π/8 add up to be 3π/2, which is 270 degrees. But in the identity when we add them, it should come out to be 90 degrees, right?
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Academic discussion and doubt solving for: Logarithms, Set Theory, Matrices & Determinants, Permutation & Combination, Probability, Binomial Theorem
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Here, π/8 and 7π/8 are supplementary (see when you add them, you get π which is 180°) and the other pair would be 3π/8 and 5π/8