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3 years ago

Four lines are drawn on a coordinate plane to form trapezoid WXYZ.

Mathematics

1 answer:

Degger [83]3 years ago

6 0

Answer:

A.) Line WZ has the same slope as line XY.

C.) Line YX has a greater slope than line ZY.

D.) Line ZW has the same y-intercept as line YZ.

Step-by-step explanation:

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Find the value of sin(a/2) if cosa= 12/13<br>

daser333 [38]

Answer: sin $\frac{a}{2}$ = ± $\frac{1}{\sqrt{26} }$

Step-by-step explanation:

We very well know that,

cos2A=1−2sin²A

⟹ sinA = ± $\sqrt{(1-} \frac{cos2A}{2} )$

As required, set A = $\frac{a}{2}$ & cos a= $\frac{12}{13}$ ,thus we get

sin $\frac{a}{2}$ =± $\sqrt{\frac{1-cos a}{2} }$

∴ sin $\frac{a}{2}$ =± $\sqrt{\frac{1-\frac{12}{13} }{2} }$ = ± $\frac{1}{\sqrt{26} }$

since ,360° < $\frac{a}{2}$ <450°

,180° < $\frac{a}{2}$ <225°

Now, we are to select the value with the correct sign. It's is obvious from the above constraints that the angle a/2 lies in the III-quadrant where 'sine' has negative value, thus the required value is negative.

hope it helped!

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2 years ago

Which of the following is equal to tan(A)?

Scrat [10]

Answer: cot B

Step-by-step explanation: if i am right mark me as brainliest

8 0

3 years ago

72÷8+3.4-105÷5<br>they say the answer is 0 but don't see how.

Sidana [21]

72/8 +3*4 - 105 /5
= 9 + 12 - 21
= 21 -21
= 0

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2 years ago

Helpppppp mathhhhhhhhh

creativ13 [48]

I hope this helps you

cos71=15/P

0.325=15/P

P=46.15

8 0

3 years ago

I WILL AWARD BRAINLIEST!! PLEASE HELP!!!<br> Find the areas of the trapezoids.

Galina-37 [17]

Answer:

A = 12 units ^2

Step-by-step explanation:

The area of the trapezoid is found by

A = 1/2 (b1+b2)h

b1 = 2

b2 = 4

h = 4

I found these by looking at the graph

A = 1/2(2+4) 4

A = 1/2(6*4)

A = 12 units ^2

8 0

2 years ago