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Marizza181 [45]
3 years ago
6

Trigonometric identities

Mathematics
1 answer:
Goryan [66]3 years ago
7 0

Without knowing what Juan's exact steps were, it's hard to say what he did wrong. The least you could say is that his solution is simply not correct.

4 sin²(<em>θ</em>) - 1 = 0

==>   sin²(<em>θ</em>) = 1/4

==>   sin(<em>θ</em>) = ±1/√2

==>   <em>θ</em> = <em>π</em>/4, 3<em>π</em>/4, 5<em>π</em>/4, 7<em>π</em>/4

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m_a_m_a [10]

Answer:

24420.5

Step-by-step explanation:

Multiply all the numbers together to get the length of the cubiod

221*8.5*13= 24420.5

Hope this helped!

5 0
3 years ago
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The length of a rectangle is 5 units more than the width. The area of the rectangle is 36 units. What is the length, in units, o
sergey [27]

Answer:

11 units

Step-by-step explanation:

Let's do it this way:

Length = l

width = w

initial equation for area is l * w

We know that l = w+5

substitute.

w+5 * w = 36

solve.

6w = 36

w=6

The width is 6 units.

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length = 11 units

7 0
3 years ago
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select yes or no to indicate whether a zero must be written in the dividend to find the quotient 2.82 divided by 0.6
krek1111 [17]

Answer: no

Step-by-step explanation: change 0.6 into a whole number then divid

5 0
3 years ago
In triangle △ABC, ∠ABC=90°, BH is an altitude. Find the missing lengths. AH=4 and HC=1, find BH.
Rudik [331]

Answer:

Length of BH is 2 units.

Step-by-step explanation:

We have, ΔABC with ∠ABC = 90° and an altitude BH.

Also, it is given that the length of sides AH is 4 units and HC is 1 units.

Since, the 'Altitude Rule' states that 'the length of the altitude is the geometric mean of the line segments it bisects'.

So, we get that,

BH^{2}=AH\times HC

i.e. BH^{2}=4\times 1

i.e. BH^{2}=4

i.e. BH=\pm 2

Since, the length of the side cannot be negative.

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3 0
4 years ago
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tiny-mole [99]

Answer:

-0.9

Step-by-step explanation:

First we have to distribute. -1 times t is -1t and -1 times 8 is -8. Now, our equation will look like this: -1t - 8 = -7.1  

Next, we have to carry our -8 to the other side of the euqation. So, we have to plus 8 on both sides. -7.1 plus 8 is 0.9. Now, our equation will look like this,

-1t = 0.9.

Lastly, we have to divide -1 from both sides. 0.9 divided by -1 is -0.9. So therefore, t = -0.9.

6 0
3 years ago
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