Answer:
The first one, the third one, and the fourth one
Step-by-step explanation:
The 1st one is the Pythagorean identity. One of the most essential trig identities you have to remember.
The second one is false because A is equal to 60 and b is equal to 30 and the left side turns into 0.5 while the other side becomes -0.5.
The third one is true since it is a distinction of the identity = (OR you can simply just subtract from either side).
The fourth one is true since it's just a different version of .
Answer:
I think A
Step-by-step explanation:
Answer:
1. x = -6
2. x = -10
3. x = 12
4. x = 13/2 (can be rewritten as 6 1/2 or 6.5)
5. x = 8
6. x = -3
7. x = -5
8. x = 12
9. x = -13
0.13m = 130mm
using the conversions : 1m = 100cm and 1cm = 10mm
then 0.13m = 0.13 × 1000 = 130mm