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3 years ago

Given sin θ = 7/25, find the value of a and b in the following statements.

Mathematics

2 answers:

N76 [4]3 years ago

8 0

Answer:

sin θ = 7/25 so θ =16.26

So tan θ = tan 16.26 = 7/24 = a/24 so a =7

sec θ = 1.17445580142 = 25/b so b = -21

Brainliest?

Sergeu [11.5K]3 years ago

3 0

Answer:

a = 7, b = 24 if quadrant 1

a = -7, b = -24 if quadrant 2

Step-by-step explanation:

Tan theta = sin(theta) × sec(theta)

a/24 = (7/25) × (25/b)

ab = 168

a = 168/b

1 + tan²(theta) = sec²(theta)

1 + a²/576 = 625/b²

1 + 168²/576b² = 625/b²

1 = 576/b²

b = 24 (+ or -)

a = 168/24 = 7 (+ or -)

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Read 2 more answers

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$n=(\frac{2.58(58.2)}{1})^2 =22546.82 \approx 22547$

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Step-by-step explanation:

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$\bar X$ represent the sample mean

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And on this case we have that ME =+1 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 99% of confidence interval now can be founded using the normal distribution. The significance would be $\alpha=0.01$ and the critical value $z_{\alpha/2}=2.58$ , replacing into formula (b) we got:

$n=(\frac{2.58(58.2)}{1})^2 =22546.82 \approx 22547$

So the answer for this case would be n=22547 rounded up to the nearest integer

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3 years ago