TRIGNOMETRY! Pls HELP FOR question 8 a and 8 b! I keep getting it wrong! Whenever answers correctly with step to step gets brainliest. Btw, the answers they got for 8 a was 51 degrees and 8 b 38 degrees, so can someone explain how they got that? Thank you..

Step-by-step explanation:

a) <A = acos(20/32) = 51.3 ~ 51 deg

add an image, and i will answer

step-by-step explanation:

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.