Question

fill the gaps in the attachment with the help of the attachment
$cos \frac{\pi}{6} = .......... = cos( - \frac{\pi}{6} ) \\ sin \frac{\pi}{6} = .......... = sin(2\pi + .........)$

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Answer 1

Answer:

cos2A=1–2sinA

Step-by-step explanation:

cos2A =1-2sinA