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cris6969
13.07.2019 •
Mathematics
Give the place value of each digit in the following numbers. 78
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Ответ:
We are given
78
we can write it as
so,
tenth digit is 7
unit digit is 8........Answer
Ответ:
2sin(52.5)sin(97.5) = [√(2) + √(3)] /2
=1.5731
Step-by-step explanation:
As we the trigonometric identity of the product of sines
sin(x)sin(y) =[cos(x-y) - cos(x+y)] /2
2sin(x)sin(y) =[cos(x-y) - cos(x+y)]
putting values of x and y
2sin(52.5)sin(97.5) =[cos(52.5-97.5) - cos(52.5+97.5)]
=cos(45)-cos(150)
= 1/√(2) - (-√(3) /2)
= √(2)/2 + √(3) /2)
= [√(2) + √(3)] /2
=1.5731