Answer:
Step-by-step explanation:
Using the difference formula for cosine and the exact values
cos45° = sin45° = 
, cos30° = 
, sin30° = 
cos(a - b) = cosacosb + sinasinb
Note 15° = 45° - 30°, thus
cos15°
= cos(45 - 30)°
= cos45°cos30° + sin45°sin30°
= ( × ) + ( × )
= 
+ 
=
I don’t have the number line but the answer is -6
Answer:
15 yards
Step-by-step explanation:
use pythagoras theorem
a^2 + b^2 = c^2
9^2 + 12 ^2
81 + 144
225
square root
hypoteneuse= 15 yards
-8 < 2x + 4 < 10
<u>- 4 - 4 - 4</u>
<u>-12</u> < <u>2x</u> < <u>6</u>
2 2 2
-6 < x < 3
Answer:
me
Step-by-step explanation:
