2 years ago

Please can someone prove this equation

Mathematics

1 answer:

zubka84 [21]2 years ago

6 0

Answer:

see explanation

Step-by-step explanation:

Using the trigonometric identity

sin²x + cos²x = 1

Consider the left side

2cos²A - 1 ← replace 1 by sin²A + cos²A

= 2cos²A - ( sin²A + cos²A)

= 2cos²A - sin²A - cos²A

= cos²A - sin²A = right side ⇒ verified

You might be interested in

Look at the 2 pictures to solve

bija089 [108]

Answer:

x = 15.3

x = 20.9

Step-by-step explanation:

sin(46) = 11/x

⇒ x = 11/sin(46) = 15.3

cos(55) = 12/x

⇒ x = 12/cos(55) = 20.9

3 0

1 year ago

The measures of the angles of a triangle are shown in the figure below. Solve for x.

slavikrds [6]

Answer:

x=13

Step-by-step explanation:

We add all the numbers together, and all the variables

6x-78

We move all terms containing x to the left, and all other terms to the right

6x=78

x=78/6

which should equal 13

3 0

11 months ago

Expand (x-2)^7 using binomial theorem

umka2103 [35]

Answer:

Urr answer...

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

What are the coordinates of B if (5,3) is 1/3 of the way from A to B

LenaWriter [7]

The coordinates would be 4,0?

7 0

2 years ago

Find the volume of the right triangular prism 2.5ft 3ft 7ft

Georgia [21]

26.25ft. Have a wonderful day

7 0

3 years ago