Need to turn it in soon! help!

Mathematics

1 answer:

olchik [2.2K]4 years ago

5 0

5: is false because A rectangle is a four-sided shape where every angle is a right angle (90°).Also opposite sides are parallel and of equal length.

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100-(2 8/5+1 3/8)×(3.05-0.8

Leya [2.2K]

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3 years ago

Which expression is equivalent to sin(1.8x) sin(0.5x)?

Rasek [7]

Hum, this problem was difficult. You use the next expression to solve this problem. \[\cos (A - B) = \cos A \cos B + \sin A \sin B \] \[\cos (A + B) = \cos A \cos B - \sin A \sin B\] \[\cos (A - B ) - \cos (A +B ) =2 \sin A \sin B\] So \[\sin A \sin B = 0.5 \left( \cos(A - B) - \cos(A + B) \right)\] A = 1.8 x, B = 0.5 x \[\sin (1.8x) \sin (0.5x) = 0.5\left( \cos(1.8-0.5)x - \cos(1.8+0.5)x \right)\]\[= 0.5 \left( \cos(1.3x) - \cos (2.3x) \right)\] It's finish !!

3 0

3 years ago

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frozen [14]

Answer:

$52 \sqrt[5]{7}$