The diagram shows a sector of a circle of radius 4 cm. work out the length of the arc abc

Mathematics

1 answer:

Zielflug [23.3K]3 years ago

3 0

Need to know the angle for this I think?

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Pls answer 2,3,5,6 and thank you for helping and pls work it out

skad [1K]

Answer:

2: add 4

3: 6

5: multiply by 2

6: 7

Step-by-step explanation:

7 0

3 years ago

Please please use explanation with answer

KIM [24]

Answer:

$\large\boxed{\theta=-\dfrac{\pi}{4}+k\pi\ or\ \theta=k\pi}\ for\ k\in\mathbb{Z}$

Step-by-step explanation:

$\tan^2\theta+\tan\theta=0\\\\\tan\theta(\tan\theta+1)=0\iff\tan\theta=0\ \vee\ \tan\theta+1=0\\\\\tan\theta=0\Rightarrow \theta=k\pi\ \text{for}\ k\in\mathbb{Z}\\\\\tan\theta+1=0\qquad\text{subtract 1 from both sides}\\\\\tan\theta=-1\Rightarrow\theta=-\dfrac{\pi}{4}+k\pi\ \text{for}\ k\in\mathbb{Z}$