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3 years ago

8

How to find the exact value of each trigonometric function without a calculator?

1 answer:

Goryan [66]3 years ago

5 0

Remember them is the best way to go.
draw the exact value triangles if you're unsure, but importantly, you just need to memorise these exact values.

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The formula for finding the area of a square that has a side length, s, is A = s^2. If a square has an area of 40 square units,

Darina [25.2K]

A = s^2
A = 40

40 = s^2...by taking the square root of both sides, u eliminate the ^2
sqrt 40 = s
6.32 = s <===

4 0

3 years ago

Read 2 more answers

The diameter of a cylindrical water tank is 8ft and its height is 11ft what is the volume of the tank?

Sedbober [7]

Answer:

2211.68123

Step-by-step explanation:

Using the formula to find volume of cylinder

V=πr2h=π·82·11≈2211.68123

3 0

3 years ago

3. The masses of two gorillas are given below. A female gorila has a mass of

loris [4]

Answer: 135,000g

Hope this helped :)

6 0

3 years ago

If It is known that 5

makkiz [27]

Could u give the rest of the question?

7 0

3 years ago

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Write an exponential model given the points ( 7, 12 ) and ( 8, 25 ). Round to the nearest hundredth.

inna [77]

Answer:

The exponential model is $y = 0.07\cdot e^{0.73\cdot x}$ .

Step-by-step explanation:

The exponential model can be modelled by the following mathematical expression:

$y = A\cdot e^{B\cdot x}$ (1)

Where:

$x$ - Independent variable.

$y$ - Dependent variable.

$A, B$ - Coefficients.

If we know that $(x_{1}, y_{1}) = (7,12)$ and $(x_{2}, y_{2}) = (8,25)$ , then we get the following system of equations:

$A\cdot e^{7\cdot B} = 12$ (2)

$A\cdot e^{8\cdot B} = 25$ (3)

If we divide (3) by (2), we calculate the value of $B$ :

$e^{B}=\frac{25}{12}$

$B = \ln \frac{25}{12}$

$B \approx 0.734$

And by (2), we determine the value of $A$ :

$A = 12\cdot e^{-7\cdot B}$

$A = 0.0704$

The exponential model is $y = 0.07\cdot e^{0.73\cdot x}$ .

4 0

3 years ago