Question
$\cos (2 \theta)=\cos ^{2} \theta-$ ______ - = _______ - 1 = 1 - _______.
Step 1
Step 1: The given equation is $\cos (2 \theta)=\cos ^{2} \theta-$ ______ - = _______ - 1 = 1 - _______. Show more…
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$\cos (2 \theta)=\cos ^{2} \theta-$____________=_________-1
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cos(2θ) = cos2 θ - ________ = _________ - 1 = 1 - ______.
$$ \left\{\begin{array}{l} \cos \theta=-\frac{1}{\sqrt{2}} \\ \tan \theta=1 \end{array}\right\} $$
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