Question

PLS HELP, TIMED :)),

review the proof, which step contains an error?
step 1, 4,6 or 8

Answer 1

• C. Step 6

Explanation:

Incorrect step is

• Step 6

The error is:

• cos (θ) should be negative as a result of multiplying both sides by - 1

Answer 2

step 6

Answer:

Solution given:

1. Cos(2x)=1-2sin²(x)
2. let 2x=
   `\theta`
3. x=
   `\theta/2`
4. Cos
   `\theta`=1-2sin²(
   `\theta/2`)
5. -1 +Cos
   `\theta`=-2Sin²(
   `\theta/2`)
6. 1-Cos
   `\theta`=2sin²
   `\theta/2` over here Cos
   `\theta` should be positive