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3 years ago

2.2.3 + 5.68 + 21.047=

Mathematics

1 answer:

Oksana_A [137]3 years ago

6 0

Answer:

22.3 + 5.68 + 21.047= 49.027

2.23 + 5.68 + 21.047= 28.957

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What is cos theta when sin theta = sqrt 2/3

Fittoniya [83]

Answer:

Value of cosθ is ±√7/3 .

Step-by-step explanation:

According to the Question , value of :

$\red{\implies sin\theta = \dfrac{\sqrt2}{3}}$

And , we know the identity of sine and cosine as ,

$\boxed{\pink{\sf\implies sin^2\theta + cos^2\theta = 1} }$

Using , this identity we have ;

$\implies sin^2\theta + cos^2\theta = 1 \\\\\implies \bigg( \dfrac{\sqrt2}{3}\bigg)^2 + cos^2\theta = 1 \\\\\implies \dfrac{2}{9} + cos^2\theta = 1 \\\\\implies cos^2\theta = 1 - \dfrac{2}{9} \\\\\implies cos^2\theta = \dfrac{9-2}{9} \\\\\implies cos\theta = \sqrt{\dfrac{7}{9}} \\\\\underline{\boxed{\blue{\bf \implies cos\theta = \pm \dfrac{\sqrt 7 }{3}}}}$

Now , here since θ is in 2nd quadrant and in 2nd quadrant cos is negative . Hence ,the value of cos will be :

$\boxed{\orange{\bf \implies cos\theta =-\dfrac{\sqrt7}{3}}}$

3 0

2 years ago

Solve 5 + 44 = 2 + r

pickupchik [31]

Okay the answer is r=47
Let's solve your equation step-by-step.5+44=2+r
Step 1: Simplify both sides of the equation.5+44=2+r
Simplify:49=r+2
Step 2: Flip the equation.r+2=49
Step 3: Subtract 2 from both sides.r+2−2=49−2r=47
Answer:r=47
Hope this helps!:)

6 0

3 years ago

Read 2 more answers

Which is the best estimate for the quotient of 198.32 ÷ 9.001?

Whitepunk [10]

I would believe it to be 22

4 0

3 years ago

Read 2 more answers

Suppose f is a function. If 10 = f(-4), find the coordinates of a point on the graph of f?

Rashid [163]

Given:

For a function f, $10 = f(-4)$ .

To find:

The coordinates of a point on the graph of f.

Solution:

We have,

$10 = f(-4)$

It means the value of function f is 10 at -4.

On a coordinate plane x-axis represents the input values and y-axis represents the output values of a function. So,

x-coordinate = input value = -4

y-coordinate = output value = 10

Therefore, the required coordinates of a point on the graph of f are (-4,10).

5 0

3 years ago

X + 4 = 11

mojhsa [17]

Answer:

A. Subtraction

B. Subtraction

C. x+4=11

-4 -4

D. x=7

Step-by-step explanation:

3 0

3 years ago