(1-cos^2(x)) csc^2(x)=1
one of the trigonometry rules is sin^2(x) + cos^2(x) = 1 if you rearrange this you realize that sin^2= 1-cos^2(x)
we also know that csc^2(x)= 1/sin^2(x) so now you can rewrite your equation as:
sin^2(x) x 1/sin^2(x) = 1
sin^2(x)/sin^2(x) =1
the LHS (left hand side) can cancel down to 1 because the numerator and denominator are the same
so then 1=1 Therefore LHS=RHS
Hope this helps
Answer:
Though both Seattle and Tacoma grew at a rapid rate from 1880 to 1890, based on the strength of their timber industries, Seattle's growth as an exporter of services and manufactured goods continued for another two decades, while Tacoma's growth dropped almost to zero.
Step-by-step explanation:
* يدرج صوت سيارة الإسعاف*
Answer:
B.
Step-by-step explanation:
The formula for area of a circle is π times r squared. The radius is 4. So 4 squared is 16. 16 times pi(3.14) is 50.24
Answer:
a) 3 kilograms
b) 5.7 kilograms
Step-by-step explanation:
Z-score:
In a set with mean
and standard deviation
, the zscore of a measure X is given by:

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this question:

We have to find X for both values of Z.
a) z = -1.35




3 kilograms
b) z = 2.64




5.7 kilograms