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Mathematics

2 answers:

Serga [27]2 years ago

7 0

Answer:

114

Step-by-step explanation:

15 x 2 + 9 x 2 + 11 x 3 + 11 x 3 = 114

(the bottom portion is equal to 3 x 11)

SpyIntel [72]2 years ago

3 0

11 plus 9 plus 11 is 31.

31 plus 15 plus 15 is 61.

61 plus 11 plus 11 is 83.

83 plus 9 plus 9 is 101.

13 minus 9 is 4.

So the answer is C 114 mm.

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Find the exact values of cos 3 pi/4 radians sin 3 pi/4 radians.

Liula [17]

If you consult the unit circle, you will see that:

$cos(\frac{3\pi}{4}) = -\frac{\sqrt{2}}{2}\\\\sin(\frac{3\pi}{4}) = \frac{\sqrt{2}}{2}$

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Now, lets multiply it together.

$-\frac{\sqrt{2}}{2} \cdot \frac{\sqrt{2}}{2} =\\\\-\frac{2}{4} =\\\\ \boxed{\bf{-\frac{1}{2}}}$

So, <span>cos(3pi/4)sin(3pi/4) = -1/2</span>