Mathematics, 21.10.2019 21:20, tilsendt

Which of these statements is a trigonometric identity? provide evidence to support your claim.
statement 1: sin2(theta) = 1 − cos2(theta) for theta any real number.
statement 2: 1 − cos(theta) = 1 − cos(theta) for theta any real number.
statement 3: 1 − cos(theta) = 1 + cos(theta) for theta any real number.

Answers: 3

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Which of these statements is a trigonometric identity? provide evidence to support your claim.