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Dimas [21]
3 years ago
8

If Sin 3x= Cos (x-60), find the value of x​

Mathematics
1 answer:
Kamila [148]3 years ago
4 0

Answer:

x = 15

Step-by-step explanation:

Assuming 3x and x-60 are in degrees, you can use:

cos(a) = sin(a+90)

To rewrite the equation as:

sin(3x) = sin(x-60+90)

sin(3x) = sin(x+30)

3x = x+30

2x = 30

x = 15

But, solving 3x = x+30 which simplifies to x=15 is not the only solution to this equation, as you can see in below picture. Finding all solutions is a bit more work, but maybe that is not required in your case.

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Write two division expressions that have the same value as 36.8 divided by 2.3 (16)
kotegsom [21]

Answer:

64 divided by 4=16

144 divided by 9=16

Step-by-step explanation:

8 0
2 years ago
PLEASE HELP! WILL MARK THE BEST ANSWER BRAINLIEST!
Harlamova29_29 [7]

Answer:B

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
A chicken weighs t lbs. It needs to be cooked for 20 minutes per lb plus an extra 15 minutes. What is the total cooking time? Is
Nostrana [21]

Answer:

Total cooking time = 20t + 15

The expression 15t + 20 is wrong.

Step-by-step explanation:

weight of chicken = t lbs

cook time per lb = 20 minutes

This means that:

1 lb weight requires a cooking time of 20 minutes

1 lb = 20 minutes

∴ t lbs = 20 × t = 20t minutes.

We were also told that each chicken required an extra cooking time of 15 minutes, in addition to the total cooking time due to the weight. Therefore, the total cooking time is calculated thus:

Total cooking time = cooking time due to weight + 15 minutes

Total cooking time = 20t + 15

Hence the expression 15t + 20 is wrong, due to the explanation given above.

8 0
3 years ago
What is the b-value?
Alona [7]

the anwser to b value is 777

3 0
3 years ago
The length of a rectangle is 9.7cm more then 4 times the width. If the perimeter of the rectangle is 91.4cm, what are the dimens
Ksju [112]
The dimensions are Width of the rectangle = 7.2 cm
Length of the rectangle = 4x + 9.7
                                      = 28.8 + 9.7
                                      = 38.5 cm. thats all
4 0
3 years ago
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