Question

☝Please refer to the attachment.
☀ Solove it..(d2=dcos theta how?)
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Answer 1

here is Ur explanation..

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in the given tight angled triangle,

$\cos(theta) = \frac{d 2 }{d} \\ d 2 = d \cos(theta)$

plz mark me as brainliest....

Answer 2

Answer:

we know that cos theta=d2/d

So cos thetad=d2