Answer:
(c) The t-distribution is bell shaped
(e) The t-distribution has more values at the extremes than a standard normal distribution
(f) The t-distribution is centered at 0
Step-by-step explanation:
When the sample size is small or population variance is unknown, and we have to estimate population parameter then t- probability distribution is used.
The t-distribution has properties as follows:
- The mean of t-distribution is 0. Thus, option (f) is correct.
- t-distribution is normal. Thus, option (c) is correct.
- As compare to standard normal distribution, t-distribution has more values at the extremes. Thus, option (e) is correct.
Answer:
Step-by-step explanation:
how big how heavy i think
hey!!
The given question should be as follows:-
(cosecA-sinA) (secA-cosA) = 1/(tanA+cotA).
L.H.S.
=(cosecA-sinA) (secA-cosA).
=(1/sinA-sinA)(1/cosA-cosA).
=(1-sin^2A) (1-cos^2A)/sinA.cosA.
=cos^2A.sin^2A/sinA.còsA.
=sinA.cosA/1.
=sinA.cosA/(sin^2A+cos^2A).
On dividing above and below by sinA.cosA.
=(sinA.cosA/sinA.cosA)/(sin^2A/sinA.cosA+cos^2A/sinA.cosA).
= 1/(tanA+cotA).
Hope it is clear and hope it would help you!
The value of x from the logarithmic expression is 4 and -8
<h3>Given the logarithmic expression</h3>
Logarithm are inverse of exponential function. Given the logarithmic function below;
log (X) + log (X+4)=log 32
Since<u> positive will become multiplication</u>, hence;
X(X+4) = 32
Expand
X^2 + 4x = 32
x^2 + 4x - 32 = 0
x^2 + 8x - 4x - 32 = 0
x(x + 8) - 4(x + 8) = 0
(x-4)(x+8) = 0
X = 4 and -8
Hence the value of x from the logarithmic expression is 4 and -8
Learn more on logarithmic expression here: brainly.com/question/25710806
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