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fredd [130]
3 years ago
9

For what value of x is sin x = cos 19°, where 0°< x < 90°? 38°

Mathematics
2 answers:
Digiron [165]3 years ago
6 0
Sin x =cos 19 X =sin^1(cos 19) X=71
Olin [163]3 years ago
6 0

Answer:

x = 71.

Step-by-step explanation:

Given  : sin x = cos 19°, where 0°< x < 90°.

To find : For what value of x .

Solution : We have given

sin x = cos 19°.

By the trigonometric rule sin x = cos ( 90 -x ).

We can write cos ( 90 -x ) in place of sin x.

cos ( 90 -x ) = cos 19°.

Then

90 - x = 19 .

On subtracting both sides by 90

-x = 19 -90 .

- x = -71.

On dividing by -1

x = 71.

Therefore, x = 71.

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Can you help me plzs
Jlenok [28]

Answer:

164

Step-by-step explanation:

2x+7+5x+12=180

7x+19=180

7x+180-19

7x=171

----  ----

7      7

x=164

6 0
3 years ago
Read 2 more answers
Two lines intersect to form a linear pair with equal measures. One angle had the measure 2x and the other angle had the measure
rosijanka [135]

Answer:

x = 45, y = 5

Step-by-step explanation:

It is given that two lines form a linear pair with equal measures. Therefore, the angle between the two lines will be 90. Now, according to the question,

2x + 20y - 10 =90

2x+20y = 100

x + 10y = 50

And

2x = 20y-10

x = 10y -5

x - 10 y = -5

Now, adding x + 10y = 50 and x - 10y =-5, the value of x can be found. The required value will be:

x + 10y =50

x - 10y = -5

------------------

x = 45

Therefore, the value of y after substitution of the value of x in one of the equations will be:

90 = 20y - 10

20 y = 100

y = 5

Hence, the required value of x and y are 45 and 5 respectively.

4 0
3 years ago
I need health drink is 130% of the recommended daily allowance RDA for a certain vitamin the RDA for this vitamin is 45 MG. How
Tanzania [10]

From this question I take it that you need to know what is 130% of 45 mg. 130% of 45 is equal to 1.3x45, which is 58.3. So, your answer is 58.3 mg of the vitamin.

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2 years ago
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ICE Princess25 [194]

1. Divide both sides by 2

2. Add 16 to each side

Answer  x > -2

         

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Samantha glued stickers on a sheet with an area of 1260 square sentimeters in 1/6 of an hour what is the speed, in square centim
kondor19780726 [428]
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