![\bf \textit{Sum and Difference Identities} \\\\ sin(\alpha + \beta)=sin(\alpha)cos(\beta) + cos(\alpha)sin(\beta) \\\\ sin(\alpha - \beta)=sin(\alpha)cos(\beta)- cos(\alpha)sin(\beta) \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ sin\left(x-\frac{\pi }{2} \right)\implies sin(x)cos\left( \frac{\pi }{2} \right)-cos(x)sin\left( \frac{\pi }{2} \right) \\\\\\ sin(x)[0]-cos(x)[1]\implies -cos(x)](/tpl/images/0371/4148/c4ad9.png)
Sin(x-pi/2)=-cosx
prove the identity...
Answers: 1
Another question on Mathematics
Mathematics, 21.06.2019 16:00
Arectangle with an area of 47 m² is dilated by a factor of 7. what is the area of the dilated rectangle? enter your answer in the box. do not leave your answer as a fraction.
Answers: 1
Mathematics, 21.06.2019 17:30
Sheila wants to bake six muffins but the recipe is for 12 muffins . this means you only need half of the ingredients listed how much of the of each ingredient does she need? one cup and banana chips ,7 tablespoons oil , two eggs, 3/4 cups flour 1/4 cup walnuts show all you work and justify your answer using a baby toulmin.
Answers: 3
Mathematics, 21.06.2019 19:00
Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1
Answers: 2
Mathematics, 22.06.2019 00:00
Fill in the blank 1. a rhombus is a rectangle a) always b) sometimes c) never 2. a square is a quadrilateral a) always b) sometimes c) never 3. a trapezoid is a kite a) always b) sometimes c) never 4. a quadrilateral is a kite a) always b) sometimes c) never 5. a square is a rhombus a) always b) sometimes c) never 6. a parallelogram is a rectangle a) always b) sometimes c) never
Answers: 1
You know the right answer?
Questions
Computers and Technology, 20.01.2020 23:31
Chemistry, 20.01.2020 23:31
Computers and Technology, 20.01.2020 23:31
Computers and Technology, 20.01.2020 23:31
