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Brums [2.3K]
3 years ago
8

Cynthia invests

Mathematics
1 answer:
evablogger [386]3 years ago
6 0

Answer:

400

Step-by-step explanation:

The answer is 400. You get 5 percent of 800 and then multiply and divide to get the answer of the question

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Find the exact value of cos theta​, given that sin thetaequalsStartFraction 15 Over 17 EndFraction and theta is in quadrant II.
vova2212 [387]

Answer:

cos \theta = -\frac{8}{17}

Step-by-step explanation:

For this case we know that:

sin \theta = \frac{15}{17}

And we want to find the value for cos \theta, so then we can use the following basic identity:

cos^2 \theta + sin^2 \theta =1

And if we solve for cos \theta we got:

cos^2 \theta = 1- sin^2 \theta

cos \theta =\pm \sqrt{1-sin^2 \theta}

And if we replace the value given we got:

cos \theta =\pm \sqrt{1- (\frac{15}{17})^2}=\sqrt{\frac{64}{289}}=\frac{\sqrt{64}}{\sqrt{289}}=\frac{8}{17}

For our case we know that the angle is on the II quadrant, and on this quadrant we know that the sine is positive but the cosine is negative so then the correct answer for this case would be:

cos \theta = -\frac{8}{17}

5 0
3 years ago
BRAINLIEST ANSWERS ONLY.
mars1129 [50]

Answer:

Heyy

Step-by-step explanation:

△ABC is a right angled triangle and right angle at B

sinA=

AC

BC

, cosA=

AC

AB

⟹sinA+cosA=

AC

BC

+

AC

AB

=

AC

BC+AB

[We know that sum of two sides of a triangle is greater than the third side]

⟹sinA+cosA>

AC

AC

=1

Hence, sinA+cosA>1

4 0
2 years ago
Can someone please help?
Vladimir [108]

Answer:

1.

C. 6561 is the answer that the table represents

6 0
3 years ago
Read 2 more answers
Mary creates a table of values for a function and plots the points. She finds that the difference in the y values is the same. W
laiz [17]
Linear. When the difference of y values are the same in a function, they are linear.
4 0
3 years ago
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If sin theta = 3/4 and is in the first quadrant, then cos theta
Rashid [163]

Answer:

\frac{\sqrt{7} }{4}

Step-by-step explanation:

since sin theta = 3/4, opposite length = 3 units and hypotenuse length = 4 units

by pythagoras' theorem, adjacent length = \sqrt{7}

thus cos theta = adjacent/hypotenuse = \frac{\sqrt{7} }{4}

7 0
2 years ago
Read 2 more answers
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