Math 115 = Trigonometry Proof Take Home TEST
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Marks
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1. [10] Using a unit circle argument, derive the 3 Pythagorean Identities.
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2. (a) [25] Derive the difference identity for cosine function using a unit circle argument
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(e) [10] Using the sum identities for sine and cosine functions, derive the sum identities for the tangent
function.
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4.[10] Using the difference formulas for sine and cosine functions, derive the difference formulas for
the tangent function.
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5.[5] Derive the half angle identitiy for both the sine and cosine function.
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