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Based on pythagorean identities, which equation is true? The last option is correct. Sin² ∅ + cos² ∅ = 1 1+cot² ∅ = csc² ∅ tan² ∅ + 1 = sec² ∅ 1+cot² ∅ = csc² ∅ ⇒ transposing 1 and csc² ∅ we will have now cot² ∅ […] Based on pythagorean identities, which equation is true?