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3 years ago

The three trigonometric functions can be used to calculate unknown side lengths and angles in which type of triangle(s)?

1 answer:

3 0

Using the three trigonometric functions can be used to calculate unknown side lengths and angle in a right-angle triangle only.

But, if ever you we're given to find a non right-angle triangle, you will have to use sine rule or cosine rule.

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How do I solve the equation in an interval from 0 to 2π ? 9 cos 2t = 6

Ivahew [28]

$9\cos(2t)=6\implies\cos(2t)=\dfrac23$

Using the fact that cos is 2π-periodic, we have

$\cos(2t)=\dfrac23\implies2t=\cos^{-1}\left(\dfrac23\right)+2n\pi$

That is, $\cos(\theta+2n\pi)=\cos\theta$ for any $\theta$ and integer $n$ .

$\implies t=\dfrac12\cos^{-1}\left(\dfrac23\right)+n\pi$

We get 2 solutions in the interval [0, 2π] for $n=0$ and $n=1$ ,

$t=\dfrac12\cos^{-1}\left(\dfrac23\right)\text{ and }t=\dfrac12\cos^{-1}\left(\dfrac23\right)+\pi$

4 0

3 years ago

PLEASE HELP ASAP

zaharov [31]

Wouldn’t it be 0, as that’s when their values are both equal to each other, making the equation true?

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3 years ago

Xavier is helping his mom paint their house. His mom likes 3 different body colors and 5 different trim colors. How many differe

san4es73 [151]

I think its eight combinations.<span />

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3 years ago

Read 2 more answers

An empty box is shaped like a rectangular prism. The box has a base area of `9/10` square foot and a height of `1/3` foot. How m

NNADVOKAT [17]

Answer: You are finding the capacity of this box so you will need to multiply all the numbers together so 9/10*1/3=3/10 so the answers A.

Step-by-step explanation:

7 0

3 years ago

Triangles J K L and M N R are shown.

Free_Kalibri [48]

The correct answer is option B which is we need ∠L ≅ ∠R to prove congruency.

<h3>What is congruency?</h3>

The Side-Angle-Side Congruence Theorem (SAS) defines two triangles to be congruent to each other if the included angle and two sides of one is congruent to the included angle and corresponding two sides of the other triangle.

According to the SAS theorem which means Side Angle Side, The angle which is included between the two sides must be congruent.

Here we are given that

KL = NR

JL = MR

Now in the figure, we can clearly see that the angle included between JL & KL is L & the angle included between NR & MR is R.

So for the triangles to be congruent by SAS, angle L must be congruent to angle R.

∠L=∠R

Therefore the correct answer is option B which is we need ∠L ≅ ∠R to prove congruency.

Learn more about congruency at

brainly.com/question/14418374

#SPJ1

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2 years ago