Mathematics, 02.08.2019 07:00 ani61
With these two questions i'm very confused! 1) if cos θ = 0.54, find sin(θ-pi/2). 2) if cot x = -0.18, find tan(x-pi/2).
Answers: 1
![\bf sin\left( \theta -\frac{\pi }{2} \right)\implies sin\left[-\left( \frac{\pi }{2}-\theta \right) \right]\implies -sin\left( \theta -\frac{\pi }{2} \right)\implies -cos(\theta ) \\\\\\ \textit{and since }cos(\theta )=0.54\qquad then\qquad -cos(\theta )\implies -0.54](/tpl/images/0160/8712/bc457.png)
![\bf tan\left( x-\frac{\pi }{2} \right)\implies \cfrac{sin\left( x-\frac{\pi }{2} \right)}{cos\left( x-\frac{\pi }{2} \right)}\implies \cfrac{sin\left[ -\left( \frac{\pi }{2}-x \right) \right]}{cos\left[ -\left( \frac{\pi }{2}-x \right) \right]} \\\\\\ \cfrac{-sin\left( \frac{\pi }{2}-x \right)}{cos\left( \frac{\pi }{2}-x \right)}\implies -tan\left( \frac{\pi }{2}-x \right)\implies -cot(x) \\\\\\ \textit{and since }cot(x)=-0.18\qquad then\qquad -cot(x)\implies 0.18](/tpl/images/0160/8712/2e182.png)
Another question on Mathematics
Mathematics, 21.06.2019 12:30
Which of the following transformations does not preserve congruence? * 5 points a. (x, y) → (y − 3, x − 3) b. (x, y) → (x + 5, y − 1) c. (x, y) → (y + 9, −x + 2) d. (x, y) → (3x + 1, 3y − 2)
Answers: 3
Mathematics, 21.06.2019 17:30
Is it true or false i’m trying to pass this test so i can leave school
Answers: 2
Mathematics, 21.06.2019 19:30
Factor the following expression. 27y3 – 343 a. (3y + 7)(9y2 + 2ly + 49) b. (3y – 7)(9y2 + 2ly + 49) c. (3y – 7)(932 – 217 + 49) d. (3y + 7)(92 – 2ly + 49)
Answers: 1
Mathematics, 21.06.2019 19:30
Which of the following transformations will always produce a congruent figure?
Answers: 2
You know the right answer?
With these two questions i'm very confused! 1) if cos θ = 0.54, find sin(θ-pi/2). 2) if cot x = -0...
Questions
English, 16.10.2020 15:01
Biology, 16.10.2020 15:01
Biology, 16.10.2020 15:01
History, 16.10.2020 15:01
Mathematics, 16.10.2020 15:01
English, 16.10.2020 15:01
Mathematics, 16.10.2020 15:01
Biology, 16.10.2020 15:01
English, 16.10.2020 15:01
Business, 16.10.2020 15:01
Arts, 16.10.2020 15:01
English, 16.10.2020 15:01
Mathematics, 16.10.2020 15:01
