15+70+45=130 :)) that’s how u calculate the perimeter just add them all together.
The answer to this is 8.6 repeating
<span>tan(15) =
sin(15) / cos(15) =
sin(45 - 30) / cos(45 - 30) =
[ sin(45)cos(30) - sin(30)cos(45) ] / [ cos(45)cos(30) + sin(45)sin(30)]
Since sin(45) = cos(45) = √2/2, you can just factor that out from the top and bottom
[ cos(30) - sin(30) ] / [ cos(30) + sin(30)]
[ √3/2 - 1/2 ] / [ √3/2 + 1/2]
(√3 - 1) / (√3 + 1)
(√3 - 1)^2 / (√3+1)(√3 - 1)
(√3 - 1)^2 / (3 - 1)
(3 - 2√3 +1) / 2
2 - √3
There's also a formula for tan(a-b), but I couldn't remember it off hand.</span>
Hey!
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Steps To Solve:
~Substitute
(4)2 - (-5)2
~Multiply
8 - (-10)
~Subtract
18
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Answer:
18
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Hope This Helped! Good Luck!
Answer:just find a common denomintor and add them
Step-by-step explanation:
