Find the exact value of sin (-270 degrees).

1 answer:

3 0

The exact value of sin (-270) is determined using the calculator in degrees mode. The answer is equal to 1. If the radians mode is used, -270 is equal to -2 pi/3. Hence using the calculator, we can verify that the answer is still 1. The value of -270 matters.

You might be interested in

R varies directly as s. Find r when s=10 and k=4

nadezda [96]

Step-by-step explanation:

Since, r varies directly as s

$\therefore \: r \: \: \alpha \: \: s \\ \therefore \: r = k s..(1) \: \\ (k = \: constant \: of \: proportionality ) \\ plug \: s = 10 \: and \: k = 4 \: in \: equation \: (1) \\ r = 4 \times 10 \\ \huge \red{ \boxed{ \therefore \: r =40}}$

5 0

3 years ago

Read 2 more answers

Geometry QwQ ////3 ..... help....please....

Ulleksa [173]

Triangle AGB is congruent to Triangle CGB.

3 0

2 years ago

if Janet spent 15 hours reading a 1,200 page book how many pages did Janet read per minute , round answer to decimal

Naddik [55]

1.3 pages first you take 15 * by 60 because 60 min. in one hour and then divide 1200 by 900 you get 1.3

8 0

3 years ago

Read 2 more answers

HELP!!!!<br><br> What is the surface area of the figure below?

GuDViN [60]

surface area= perimeter x height + 2b

s= pxh+2b

example: 18(8)+2(12)

explain: 18 is the perimeter and 8 is the height then you have to add the base times 2

8 0

3 years ago

Help with this math question

tresset_1 [31]

The given inequality is:

$|-8x+24| \leq 16$

This inequality can be divided in two parts as:

a) $-16 \leq -8x +24$
b) $-8x + 24 \leq 16$

Solving part a:

$-16 \leq -8x+24 \\ \\ 
-40 \leq -8x \\ \\ 
5 \geq x \\ 
or \\ 
x \leq 5$

Solving part b:

$-8x+24 \leq 16 \\ \\ 
-8x \leq -8 \\ \\ 
x \geq 1$

Therefore, the solution to the given inequality is $x \leq 5$ and $x \geq 1$ . Combining both the ranges we get the solution: $1 \leq x \leq 5$ .

In interval notation, this solution can be expressed as [1,5]

3 0

3 years ago

Read 2 more answers