3 years ago

Find the exact value of sin(20) using the double-angle formula given: sin(0) = -4/5 , π<0<3π/2

Mathematics

1 answer:

viktelen [127]3 years ago

5 0

Answer:

I think its A

Step-by-step explanation:

Sin(20) = 0.91294525072 which in a fraction it would be 24/25

You might be interested in

What is 4.6 × 108 cm/min in meters per hour? A. 2.76 × 10^8 m/h B. 2.76 × 10^10 m/h C. 7.67 × 10^6 m/h D. 7.67 × 10^8

siniylev [52]

$1m=100cm\to1cm=0.01m\\1h=60min\to1min=\frac{1}{60}h\\========================\\\\4.6\times10^8\ cm/min=4.6\times10^8\times\frac{0.01m}{\frac{1}{60}h}=4.6\times10^8\times0.6\ m/h\\\\=\boxed{2.76\times10^8\ m/h}\\\\Answer:\fbox{A.}$

7 0

3 years ago

Eddie's moving company moved 3 boxes out of Mrs. Diaz's house. The box labeled "kitchen" was 4 times heavier than the box labele

Svetach [21]

K - Kitchen
b - Bedroom
l - Library

k = 4b
l = 14b
k + b + l = 817 pounds
4b + b +14b = 817 pounds
19b = 817 lbs
b = 817/19 pounds
b = 43 pounds

Since k = 4b
k = 4 * 43 pounds
k = 172 pounds

7 0

3 years ago

A rectangle has a perimeter of 20 cm. Its longest side is 6 cm. What is its area?

melamori03 [73]

Answer:

$\boxed {24 cm^{2}}$