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6.2_bzat4e

6.2_bzat4e - a sin b sin c sin d cos θ β θ β Sum and...

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Section 6.2 Sum and Difference Formulas

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The Cosine of the Difference of Two Angles

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Verify that cos sin 2 π θ θ - = ÷
Example 0 0 0 0 Find the exact value of cos 100 cos 55 + sin 100 sin 55

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Example ( 29 Verify the identity: cos - cos π θ θ = -
Sum and Difference Formulas for Cosines and Sines

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Example 0 0 0 0 Find the sin 75 given that 75 45 + 30 =

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Example 0 0 0 0 Find the sin 15 given that 15 45 - 30 =
Example ( 29 3 12 Suppose that cos = - for a quadrant II angle and cos = 5 13 for a quadrant I angle . Find the exact value of each of the following. a. sin

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Unformatted text preview: a. sin b. sin c. sin( + ) d. cos θ β θ β + Sum and Difference Formulas for Tangents Example ( 29 Simplify: tan π θ-(a) (b) (c) (d) ( 29 Simplify cos π β + sin 1- cos (a) (b) (c) (d) 2 Find the exact value of sin 3 4 π - ÷ ( 29 2 1 3 3 1 2 3 2 2 2 3 1 4 + + + (a) (b) (c) (d) 5 Simplify tan 4 π θ + ÷ 1 tan tan 1 tan 1 tan 1 tan 1 tan tan 1 + +-+-...
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