Answer:
I and IV
Step-by-step explanation:
Since 1-sin(θ)² = cos(θ)², the given equation is equivalent to ...
√(cos(θ)²) = |cos(θ)| = cos(θ)
This will be true where the cosine is non-negative, in the first and fourth quadrants.
Answer:
-0.004 repeating
Step-by-step explanation:
5 times negative three is -15 and that to the negative second power is -0.004 with the 4 repeating.
Answer:
AB ≈ 6.53
Step-by-step explanation:
using the cosine ratio in the right triangle
cos40° = 
= 
= 
( multiply both sides by AB )
AB × cos40° = 5 ( divide both sides by cos40° )
AB = 
≈ 6.53 ( to the nearest hundredth )
