Step-by-step explanation:
sin ∅ + 1 = cos2∅
From multiple angles in trigonometry
cos2∅ = 1 - 2sin²∅
So we have
sin∅ + 1 = 1 - 2sin²∅
sin∅ +1 - 1 + 2sin²∅= 0
sin∅ + 2sin²∅ = 0
Factor out sin∅
sin∅ ( 1 + 2sin∅) = 0
sin ∅ = 0
∅ = 0° , 180°
1 + 2sin∅ = 0
2sin∅ = - 1
sin ∅ = -1/2
∅ = 210° , 330°
The solutions are
<h3>0° , 180° , 210° , 330°</h3>
Hope this helps you
Answer:
StartLayout Enlarged Left-Brace 1st Row 2 l + 2 w = 96 2ndRow l w = 504 EndLayout
Step-by-step explanation:
The equation for the perimeter is ...
P = 2l +2w
The equation for the area is ...
A = lw
Using these equations with the given perimeter and area, we can write the system of equations ...
1.202
3/5 and 1/2 can be 6/10 and 5/10. then 0.1/2 is 0.05. for the other part, just plug 0.72 x 1.6 into a calculator.
Answer:
- ∠1 and ∠3
- ∠6 and ∠8
- ∠5 and ∠7
Step-by-step explanation:
Corresponding angles are in the same direction from the point of intersection of the lines that create them. Any angles in the same position (first, second, third, ...) in your lists are corresponding:
1 and 3 -- an answer choice
5 and 7 -- an answer choice
6 and 8 -- an answer choice
2 and 4
Answer:
17/12
Step-by-step explanation:
i hope this is right