All categories

2 years ago

I need help with trig identities!!! (You will get 10 points!)

Mathematics

1 answer:

IgorLugansk [536]2 years ago

4 0

Look at the picture. I have no idea why I can't add an answer.

You might be interested in

Find the solutions for a triangle with a = 16, c =12, and B = 63º.

maks197457 [2]

Answer:

b. A = 71.6°; C = 45.40°; b =15.0

Step-by-step explanation:

The missing values can be found with the help of the Law of Cosine and properties of triangles:

Side b (Law of Cosine)

$b = \sqrt{a^{2}+c^{2}-2\cdot a \cdot c \cdot \cos B}$

$b = \sqrt{16^{2}+12^{2}-2\cdot (16)\cdot (12) \cdot \cos 63^{\circ}}$

$b \approx 15.022$

Angle A (Law of Cosine)

$\cos A = -\frac{a^{2} - b^{2}-c^{2}}{2\cdot b \cdot c}$

$\cos A = - \frac{16^{2}-15.022^{2}-12^{2}}{2\cdot (15.022)\cdot (12)}$

$\cos A = 0.315$

$A= \cos^{-1} 0.315$

$A \approx 71.639^{\circ}$

Angle C (Sum of internal angles in triangles)

$C = 180^{\circ} - 63^{\circ} - 71.639^{\circ}$

$C = 45.361^{\circ}$

Hence, the right answer is B.

6 0

3 years ago

The table shows the types of DVDs customers rented from Sunshine Movie Rentals last year.How many comedy and action movies were

Alex787 [66]

Just borrow from the 7 and take the 1 to the 2 and that will make it as 12 so then you subtract 12 - 4 and the answer will be 1,180

4 0

3 years ago

Read 2 more answers

What is 4 (x-y) - 3 (x-y) ?

Anettt [7]

Answer: x+y

Step-by-step explanation: 4x-4y-3x-3y

4x-3x is x

4y-3y is y

7 0

2 years ago

Read 2 more answers

HELP MATH QUESTION PRE CAL

Zarrin [17]

Use the pythagorean theorem. It would be set up as
a^2 + 3.7^2 = 4.0^2

8 0

2 years ago

What is 2(-9x-4y-7) simplified

Setler79 [48]

-18x-8y-14 because you need to distribute the digits

4 0

2 years ago