Answer:
1-B
2-C
3-D
Step-by-step explanation:
In the attached file
The numbers are 4 and 2! 4 plus 2 equals 6! and 6 plus 4 is equal 10!
1.1
×
2.4
____
44
+
22
____
.66
I think this is it I did this when I was in 5th grade so I don't remember that much might wanna check with an adult.
Answer:
Step-by-step explanation:
Given
Required
Simplify
Start by collecting like terms
Simplify like terms
First let's find the angles a and b.
We have then:
sin a = 4/5
a = Asin (4/5)
a = 53.13 degrees.
cos b = 5/13
b = Acos5 / 13
b = 67.38 degrees.
We now calculate cos (a + b). To do this, we replace the previously found values:
cos ((53.13) + (67.38)) = - 0.507688738
Answer:
-0.507688738
Note: there is another way to solve the problem using trigonometric identities.
