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patriot [66]
2 years ago
8

If sin theta equals to a divided by b what is the value of sec square theta minus tan square theta

Mathematics
1 answer:
Zielflug [23.3K]2 years ago
8 0

Answer:

Square is the answer

hope it helps u

plz mark it as brainliest

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Let u = (1, 2 -2), v= (2, 1, 3) and w = j + 4k. a) Find cos theta, where theta is the angle in degrees between u and w.
vodka [1.7K]

Answer: The value of cos theta is -0.352.

Step-by-step explanation:

Since we have given that

\vec{u}=1\hat{i}+2\hat{j}-2\hat{k}\and\\\\\vec{w}=\hat{j}+4\hat{k}

We need to find the cos theta between u and w.

As we know the formula for angle between two vectors.

\cos\ \theta=\dfrac{\vec{u}.\vec{w}}{\mid u\mid \mid w\mid}

So, it becomes,

\cos \theta=\dfrac{2-8}{\sqrt{1^2+2^2+(-2)^2}\sqrt{1^2+4^2}}\\\\\cos \theta=\dfrac{-6}{\sqrt{17}\sqrt{17}}=\dfrac{-6}{17}=-0.352\\\\\theta=\cos^{-1}(\dfrac{-6}{17})=110.66^\circ

Hence, the value of cos theta is -0.352.

8 0
3 years ago
What are the zeros of the function f(x) = x2 + 8x +4, expressed in simplest radical form?
Elanso [62]

Answer:

x = - 4 ± 2\sqrt{3}

Step-by-step explanation:

Given

f(x) = x² + 8x + 4

To find the zeros let f(x) = 0, that is

x² + 8x + 4 = 0 ( subtract 4 from both sides )

x² + 8x = - 4

To solve using the method of completing the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(4)x + 16 = - 4 + 16

(x + 4)² = 12 ( take the square root of both sides )

x + 4 = ± \sqrt{12} = ± 2\sqrt{3} ( subtract 4 from both sides )

x = - 4 ± 2\sqrt{3}

Thus the zeros are

x = - 4 - 2\sqrt{3} and x = - 4 + 2\sqrt{3}

5 0
3 years ago
Help me smart math people
Paul [167]

Answer:

48 because i720 divided into 15 groups calculate to 48

3 0
3 years ago
Each volume of a encyclopedia is 2 1/3 inches wide . how many will fit on a 18 inch wide shelf
Triss [41]
7 is the most amount of books that would fit on a 18 inch shelf
7 0
3 years ago
The 24 students in Ms.Lee class each collected an average of 18 cans for recycling the 21 students in mr galvez class each colle
puteri [66]
This is a case for multiplication of #Students by#Cans and then subtract.

Ms Lee.........
24 students × 18 cans = 432
Mr Galvez...21 students × 25 cans = 525

..525
- 432
= 093

Mr Galvez' s class collected 93 more cans than
6 0
3 years ago
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