Nandy was asked to evaluate cos 19
12
so she showed the following
work:
Line 1: cos (195) = cos(+3)
(6)
Line 2: cos
57
4
+ cos
Line 3:
1
+
2
2
Line 4: -V2+1
Nandy made a mistake in her work above.
a.) What line did the mistake occur? Justify your answer. (5 points)
b.) What is the correct answer? Leave answers as exact values. WORK
DOES NOT NEED TO BE SHOWN. (5 points)

c

step-by-step explanation:

when in doubt choose

hshsndjdbdjdjdbdjdxj jd did ddn did and djd f ddnddjd fnf sbabs. d d

m∠cdf = 43° , m∠gdf = 114°, m∠gde = 23°, m∠edh = 23° , m∠cdh = 157°

step-by-step explanation:

since, it is given that de bisects the angle gdh ⇒ de divides the angle gdh into two equal angles.

⇒ m∠gde = m∠edh

⇒ 8·x   - 1 = 6·x + 5

⇒ x = 3

so, m∠gde = 8·x - 1 = 23°

and m∠edh = 23°

now, it is given ∠cde is an straight angle so, m∠cde = 180°

⇒ m∠cdf + m∠fdg + m∠gde = 180°

⇒ 43° + m∠fdg + 23° = 180°

⇒ m∠fdg = 114°

again, m∠cde = m∠cdh + m∠edh = 180°

m∠cdh + 23° = 180°

⇒ m∠cdh = 157°

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.

answer: 10 meter

step-by-step explanation:

need details