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A is a matrix of order (3*5) and the order of the matrix product AB is (3*1) then what is the order of matrix B? How would you work it out?

solve cos(x) = 0.5, (-4pi to 4pi) base = pi/3, +ve rotation x = pi/3, 2pi-pi/3 = 5pi/3 pi/3 + 2pi = 7pi/3 5pi/3 + 2pi = 11pi/3 -ve rotation x = -pi/3, x = -2pi + pi/3 = -5pi/3 -2pi - (-pi/3) = -5pi/3 -2pi - (-5pi/3) = -pi/3 are these answers right?

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in a population of 10,000 people, 75% spoke german, 45% spoke french, and 10% of the population did not speak either french or german draw a venn diagram how do you work out how many people speak both french and german, given that it's not stated above?

How would you work out tan (-2pi/3) I'm confused as it's negative

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Anyone know how to work out tan (5pi/4) as i'm really confused?

anyone?

convert 7pi/12 to degrees (7pi/12)*(180/pi) =1260pi/12pi = 105 is this correct?

If pr(A) = 0.45, pr(B) = 0.35, and pr(A inverted u B) = 0.25, how would you find Pr (A' inverted u B')

Thanks! also, do you know why is cos (-pi/4) the same as cos (pi/4)?

why is cos (-pi/4) the same as cos (pi/4)?

evaluate tan (2pi/3) = (3pi/3) - (pi/3) =(pi) - (pi/3) =+ tan (pi/3) = (√3) Is this correct?

Character growth is a prominent feature of the bildungsroman genre. How do I'm not scared (film) and the shark net (novel) explore this concept? What are 3 possible body paragraph arguments/topics I could use

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Any help will be greatly appreciated. Have a test this friday

Are my answers right? r(x) = -200x^2 + 4800x find r(x+h) -200x^2 - 400xh -200h^2 + 4800x + 4800h use differenetiation by first principles to find the equation of the rate of change in revenue respect to the month of the year -400x + 4800 find the instantaneous rate of change in revenue at B...

if you say so