Solve the equation fast please! I will say thank you and mark you Brainliest!
1 answer:
Answer:
x = ±5
Step-by-step explanation:
Multiply by (x-1)(x+1) and you get ...
(x+1) - (x -1) = (x -1)(x +1)/12
24 = x^2 -1 . . . . simplify and multiply by 12
0 = x^2 -25 . . . subtract 24
0 = (x -5)(x +5) . . . factor the difference of squares
Values of x that make the factors 0 are x=5 and x=-5.
The solutions are x=-5 or x=5.
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Subtracting the right side gives an equation that has its solutions at the x-intercepts of the left-side expression. These are seen to be -5 and +5 in the attached graph.
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Answer:
cos 225° =
sin 225° =
tan 225° = 1
Step-by-step explanation:
I cannot sketch a diagram, but a 225° angle is a 3rd quadrant angle and the reference angle is 45° (225 - 180 = 45)
cos and sin are negative in the 3rd quadrant and the tan is positive
cos 225° = - cos 45° =
sin 225° = -sin 45° =
tan 225° = tan 45° = 1