2 years ago

The value of sin^2 30° - cos^2 30° is

Mathematics

2 answers:

natulia [17]2 years ago

7 0

Answer:

-1/2

Step-by-step explanation:

Im not going to go into detail about how to compute sin30 and cos 30, but know that sine and cosine are just the ratios between the sides of a 30-60-90 triangle with a hypothenuse of 1.

With that being said:

sin^2 30 - cos^2 30

= (1/2)^2 - ((sqrt3)/2)^2

= 1/4 - 3/4

= -1/2

Ber [7]2 years ago

7 0

Answer:

-1/2

Step-by-step explanation:

You might be interested in

Whats the equation for the table

serg [7]

Answer:

multiply by 32

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

What are the zeros of the following polynomial: xo - 9x = 0

sveta [45]

Answer:

Step-by-step explanation:

hello :

x² - 9x = 0

x(x-9)=0

x=0 or x-9=0

x=0 or x= 9

6 0

2 years ago

The equation of the line of best fit of a scatter plot is y = ñ5x − 2. What is the slope of the equation?

Nady [450]

5, because y = mx + b is the equation, with m being the slope and b being the y-intercept.
Brainliest please!

4 0

2 years ago

Otto’s Autos buys a car for $12,000 and want to mark it up by 25%. How much will the new selling price be?

sp2606 [1]

Answer:

15000

Step-by-step explanation:

6 0

2 years ago

Simplify the rational expression.

Vadim26 [7]

Answer:

$\frac{x-6}{x-9}$

Step-by-step explanation:

Given

$\frac{x^2-2x-24}{x^2-5x-36}$ ← factor the numerator and denominator

= $\frac{(x-6)(x+4)}{(x-9)(x+4)}$ ← cancel (x + 4 ) on numerator/ denominator

= $\frac{x-6}{x-9}$

6 0

2 years ago

The value of sin^2 30° - cos^2 30° is​

The value of sin^2 30° - cos^2 30° is