Answer:

Step-by-step explanation:
<u>Trigonometric Identities</u>

<u>Trigonometric ratios</u>

where:
is the angle- O is the side opposite the angle
- A is the side adjacent the angle
- H is the hypotenuse (the side opposite the right angle)
Using the trig ratio formulas for cosine and sine:
Therefore, using the trig identities and ratios:

Answer:
C
Step-by-step explanation:
If this helped, please mark me as brainliest.
Linear because y= 1 - x makes a straight line
The Law of Cosine states
cos

so plugging in the numbers gives us
cos

We now have cosJ so plug that into your calculator and find arccos (arccos(cos(J)) = J)
arccos

rounding your answer will give you 34°
Answer:
x = 
Step-by-step explanation:
Given
cx - 4 = 7 ( add 4 to both sides )
cx = 11 ( isolate x by dividing both sides by c )
x = 