Answer with Explanation:
Keep in mind these trigonometric Identity:
1. Cos²x - Sin² x= Cos 2 x
2. Cos 2 x = 2 Cos²x-1
3. Cos 2 x = 1 - 2 Sin²x
Now, Coming to the Problem
1 + Cos (18 x)
= 1 + Cos (2 × 9 x)
= 2 Cos ² (9 x)→→→ Cos (2 × 9 x)= 2 Cos² (9 x) - 1
6-3=3
I subtracted the total amount of fish by the amount of trout fish we know we have. After that what is left remaining will be the number of flounder fish we have, we have 3 flounder fish.
Answer:
x = 3.8
Step-by-step explanation:
Perimeter is all the side lengths added up.
Step 1: Set up equation
x + 2(8.3) + 3.8 = 24.2
Step 2: Solve for <em>x</em>
- Multiply: x + 16.6 + 3.8 = 24.2
- Combine like terms: x + 20.4 = 24.2
- Subtract 20.4 on both sides: x = 3.8
Answer:
a i think
Step-by-step explanation:
Answer:
± 4i
Step-by-step explanation:
=
= × ×
= 4i → [ = i ]