3 years ago

What equation does the model represent

Mathematics

1 answer:

Olin [163]3 years ago

7 0

5/6 im guessing ? Im pretty sure its 5:6

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Is the following statement true or false?<br> The decimal equivalent of 9/4 is a repeating decimal.

Sergio039 [100]

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3 0

3 years ago

Establish the identity.<br> (2 cos 0-6 sin 0)² + (6 cos 0+2 sin 0)2 = 40

kogti [31]

Rewriting the left-hand side as follows,

$(2\cos\theta-6\sin \theta)^2 +(6\cos \theta+2\sin \theta)^2\\\\=4\cos^2 \theta-24\cos \theta \sin \theta+36 \sin^2 \theta+36 \cos^2 \theta+24 \cos \theta \sin \theta+4 \sin^2 \theta\\\\=40\cos^2 \theta+40 \sin^2 \theta\\\\=40(\cos^2 \theta+\sin^2 \theta)\\\\=40$