Mathematics, 20.09.2020 17:01 angie249
Use the diagram to complete the statements about how to prove the cosine sum identity. A unit circle. Point P is on the circle on the x-axis at (1, 0). Point S is in quadrant 4 on (cosine (negative beta), sine (negative beta) ). Point Q is in quadrant 1 above point P at (cosine (alpha), sine (alpha) ). Point R is above point Q at (cosine (alpha + beta), sine (alpha + beta) ). Triangles AOC and BOD are congruent by SAS. Therefore, and these lengths can be found using the . Because this is the unit circle, the coordinates of points A, B, and D are equal to cosine and sine of Alpha + Beta , Alpha, and –β, respectively. Write expressions for the lengths and set them equal. Rewrite cos(-Beta) and sin(-Beta) using the identities before squaring both sides of the equation. Simplifying the resulting expressions involving cosine and sine of Alpha, Beta, and Alpha + Beta requires using the identity. When simplified, the equation becomes cos(Alpha + Beta) = cos(Alpha)cos(Beta) - sin(Alpha)sin(Beta).
Answers: 2
Mathematics, 21.06.2019 14:10
which best describes the transformation from the graph of f(x) = x2 to the graph of f(x) = (x – 3)2 – 1? left 3 units, down 1 unitleft 3 units, up 1 unitright 3 units, down 1 unit right 3 units, up 1 unit
Answers: 1
Mathematics, 21.06.2019 17:00
Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?
Answers: 2
Mathematics, 21.06.2019 17:30
Me with this one question, and i'll upvote the brainliest answer
Answers: 2
Use the diagram to complete the statements about how to prove the cosine sum identity. A unit circle...
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