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Neko [114]
3 years ago
8

Find the solution for x on the interval [0, 2) 2 cos x sin x –cos x = 0

Mathematics
1 answer:
maxonik [38]3 years ago
7 0

Answer:

x = pi / 2 or pi / 6 or 5 pi / 6

Step-by-step explanation:

2 cos x sin x –cos x = 0

cos x ( 2  sin x – 1) = 0

cos x = 0 or 2  sin x – 1 = 0

x = pi/2 or sinx = 1/2

x= pi /2 or x = pi/6 or pi-pi/6

x = pi / 2 or pi / 6 or 5 pi / 6

as for sinx = k

if x is a solution, pi-x is also a solution

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Two angles are complementary. The measure of the largest angle is two times the measure of the smaller angle. What is the measur
skelet666 [1.2K]
An complementary angle = 90°

one of the angles is twice as large as the smaller one

let the larger angle be x, and the smaller = y

x = 2(y)
x + y = 90

Plug in 2y for x

2y + y = 90

simplify, combine like terms

2y + y = 90

3y = 90

isolate the y, divide 3 from both sides

3y/3 = 90/3

y = 90/3

y = 30

plug in 30 for y in the equation x + y = 90

x + (30) = 90

isolate the x, subtract 30 from both sides

x + 30 (-30) = 90 (-30)

x = 90 - 30

x = 60
°

The measurement of the larger angle is 60°

hope this helps
3 0
4 years ago
Anyone know what i did wrong for this problem?
Naddika [18.5K]

Answer:

I think that instead of the x beside the 5 (5x) it has to be a g. cuz in the next section it says: Answer for g variable. (g =...)

so instead of: 48 + 5x = 68.50

try: 48 + 5g = 68.50

hope it helps! have a good rest of ur day!

7 0
3 years ago
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3 years ago
Find the value of 7 + b when b= 15.<br><br> Help ?
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7 + b

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skelet666 [1.2K]

Answer:

times 5/4

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8 0
3 years ago
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