Answer:
14/16 and 16/16 for the second one please mark brainliest and God bless
Arccos(cos 7pi/2)
cos 7pi/2 = cos 630 = cos (630-360) = cos 270 = 0
arccos(0) = 90 since cos 90 = cos 270
(x): 0 - 30 - 45 - 60 - 90
sin (x) 0 - 1/2 - 1/2 √3 - 1/2 √3 - 1
cos (x) 1 - 1/2 √3 - 1/2 √3 - 1/2 - 0
tan (x) 0 - 1/√3 - 1 - √3 - ∞
Rules for sin cos tan value in each quadrant :
quadrant = I(0-90) - II (90-180)- III(180-270) - IV(270-360)
sin (x) = positive- positive - negative - negative
cos (x) = positive- negative- negative - positive
tan (x) = positive- negative- positive - negative
Answer:
it =64
Step-by-step explanation:
4x4x4
The answers are
a) 245314
b) (k2 + k- 72)/2
a)
Let F(n) denotes the sum of first n natural numbers.
F(n) = (n(n+1))/2
9+10+11+12+13+----------------------+700
F(700) - F(8) = (700*701)/2 - (8*9)/2 = 490628/2 = 245314
b)
9+10+11+-------------------k
F(k) - F(8) = (k(k+1))/2 - (8*9)/2 = (k2 + k- 72)/2
Natural numbers are all positive numbers like 1, 2, 3, 4, and so on. They are the numbers you usually count and they continue till infinity.
Learn more about natural numbers here: brainly.com/question/24672369
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Answer:
3.6?
Step-by-step explanation:
I didn't understand stand but I just divided 9 and 2.5 and got 3.6