Answer:
It's C
Step-by-step explanation:
I know this is old but I'm putting it here for others who happen to be behind or looking for answers. Have a nice day everyone ^^
Answer:
Step-by-step explanation:
Assuming the geometric series is
then nth term is
,
and the first term is found when 
:
Answer:
Concept: Ordinary Mathematics
- Just a general tip: Zoom away further from the camera to capture the question clearer.
- Calculate the Total: 31 students
- A= 4/31= 13%
- (A+B)/31 = 14/31 = 45%
- Can't see clearly what it says
Answer:
C
Step-by-step explanation:
Answer:
√10 / 10
Step-by-step explanation:
tan θ > 0 and sin θ < 0, so θ is in quadrant III. That means cos θ < 0.
cos(θ + π/4)
Use angle sum formula.
cos θ cos(π/4) − sin θ sin(π/4)
½√2 cos θ − ½√2 sin θ
Factor.
½√2 cos θ (1 − tan θ)
½√2 cos θ (1 − 2)
-½√2 cos θ
Write in terms of secant.
-½√2 / sec θ
Use Pythagorean identity (remember that cos θ < 0).
-½√2 / -√(1 + tan²θ)
-½√2 / -√(1 + 2²)
½√2 / √5
√10 / 10
