Answer:
? = 43.8°
Step-by-step explanation:
cos ? = 13/18 = 0.7222
? = 43.8°
The series will be:

Hence, Option A is the right answer
Step-by-step explanation:
The series can be fount out by putting the values of i in the expression written with the summation
The expression is:

while i = 1 to 25
Putting i = 1

Putting i = 2

Putting i = 3

....
Putting i = 25

The series will be:

Hence, Option A is the right answer
Keywords: Summation, Series
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Answer:
theta =36.45268177
Step-by-step explanation:
Since this is a right triangle, we can use trig functions
cos theta = adj/ hyp
cos theta = 74/92
Taking the inverse cos of each side
cos^-1 ( cos theta) = cos^-1 (74/92)
theta =36.45268177