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3 years ago

The exact value of sin 5pi/12 is:

Mathematics

2 answers:

monitta3 years ago

6 0

Answer: A. SQRT2 (SQRT3 -1) / 4

explanation:

Just took the quiz on A P E X.

larisa86 [58]3 years ago

3 0

Answer:

this kinda math isn't my strong suit my best guess would be 0.02

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Ivenika [448]

Answer:

photomath

Step-by-step explanation:

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3 years ago

Given f(x)= -2x+7 G(x)x/-2+7/2<br> Find g(f(x))

hodyreva [135]

Answer: g(f(x)) = g(x²-7)=x

Step-by-step explanation:

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2 years ago

Read 2 more answers

Suppose we want to choose 7 objects, without replacement, from 10 distinct objects.

Citrus2011 [14]

Answer:

= 604800

Step-by-step explanation:

10 permute 7

the order matters

10 x 9 x8 x7 x6 x5 x4

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1 year ago

Given that Cosecant (t) = negative StartFraction 13 Over 5 EndFraction for Pi less-than t less-than StartFraction 3 pi Over 2 En

Sergio [31]

Answer:

$\bold{cot(t) =\dfrac{12}{5}}$

Step-by-step explanation:

Given that:

$Cosec (t) = -\frac{13}5$

for $\pi < t < \frac{3 \pi}2$

That means, angle $t$ is in the 3rd quadrant.

To find:

Value of cot(t)

Solution:

First of all, let us recall what trigonometric ratios are positive and what trigonometric ratios are negative in 3rd quadrant.

In 3rd quadrant, tangent and cotangent are positive.

All other trigonometric ratios are negative.

Let us have a look at the following identity:

$cosec^2\theta -cot^2\theta =1$

here, $\theta =t$

So, $cosec^2t-cot^2t=1$

$\Rightarrow (-\dfrac{13}{5})^2-cot^2t=1\\\Rightarrow (\dfrac{169}{25})-cot^2t=1\\\Rightarrow \dfrac{169}{25}-1=cot^2t\\\Rightarrow \dfrac{169-25}{25}=cot^2t\\\Rightarrow \dfrac{144}{25}=cot^2t\\\Rightarrow cot(t)=\pm\sqrt{\dfrac{144}{25}}\\\Rightarrow cot(t)=\pm\dfrac{12}{5}$