Trigonometry:
We know that csc x = 1 / sin x and π = 180°;
sin 5π/ 6 = sin 150° = 1/2
csc 2π / 3 = 1 / sin 120° = 1 / √3/2 = 2 / √3
Finally:
4 · 1/2 + 7 · ( 2 / √3 )² = 2 + 7 · 4/3 =
= 2 + 28/3 = 2 + 9 1/3 = 11 1/3

5 0

3 years ago

Can anyone tell me what point I plot these two at pls

zhuklara [117]

Answer:

$x^{2} +y^{2}=25$

$x^{2} +y^{2}=5$

Radius: 5

Radius: $\sqrt{5}$

Step-by-step explanation:

(see images below)

Hope this helped!

~rere

4 0

2 years ago

Can you help me please.

Snezhnost [94]

Answer:

-86

Step-by-step explanation:

-102-

98 so the answer is -86

5 0

3 years ago