$\stackrel{\textit{Half-Angle Identities}}{cos\left(\cfrac{\theta}{2}\right)=\pm \sqrt{\cfrac{1+cos(\theta)}{2}}} \\\\[-0.35em] ~\dotfill\\\\ \sqrt{\cfrac{1+cos(45^o)}{2}}~~ = ~~cos\left( \cfrac{45^o}{2} \right)\implies \sqrt{\cfrac{1+cos(45^o)}{2}}~~ = ~~cos(22.5^o)$

7 0

1 year ago

Four polynomials are shown below:

Tatiana [17]

The appropriate choice is
Polynomial B. -3x⁴ +5x³ +5

_____
C and D are not trinomials. (They have 4 terms, not 3.) A is 5th degree, not 4th.

8 0

3 years ago

PLEASE HELP ME KIND SOUL! Look at the picture below to understand everything

ruslelena [56]

Answer:

Yes, it is 368.24, because you cannot use a digit more than once.

Step-by-step explanation:

5 0

3 years ago

A recent poll in your state shows that 25% of the vehicles are SUV’s and 10% are trucks. The poll counted 5 million SUV’s. How m

rjkz [21]

Answer:

20 million

Step-by-step explanation:

5 million SUVs are 25% of the total number of vehicles.

0.25x = 5,000,000

x = 20,000,000

Answer: 20 million

4 0

2 years ago