Mathematics, 16.10.2019 06:30, rodriguezzamyy
1. derive this identity from the sum and difference formulas for cosine:
sin a sin b = (1 / 2)[cos(a – b) – cos(a + b)]
calculation:
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reason:
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2. use the trigonometric subtraction formula for sine to verify this identity:
sin((π / 2) – x) = cos x
calculation:
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reason:
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Answers: 3
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Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42
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What is 10+10+20 about the origin the square root of a triangle.
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Mathematics, 22.06.2019 01:30, cathysilvestro
△abc is similar to △xyz. also, side ab measures 6 cm, side bc measures 18 cm, and side xy measures 12 cm. what is the measure of side yz ? enter your answer in the box.
Answers: 2
1. derive this identity from the sum and difference formulas for cosine:
sin a sin b =...
sin a sin b =...
Mathematics, 03.07.2019 13:30
Mathematics, 03.07.2019 13:30
Mathematics, 03.07.2019 13:30
Mathematics, 03.07.2019 13:30