# Find the value of-tan(90-theta)cot theta- sec (90-theta)cosec theta + 3(cot^2 67- sec^2 63) / cot 26 cot 41 cot 45 cot 49 cot 64

$\frac{\cot\Phi\cot\Phi - \csc\Phi\csc\Phi +3(\cot^{2} 67 - \sec ^{2}63)}{\cot(90 - 64) \cot(90 -49) \cot 45 \cot 49 \cot 64}$

$=\frac{\cot^{2}\Phi - \csc^{2}\Phi +3(\cot^{2} 67 - \sec ^{2}63)}{\tan 64 \tan 49*1*\cot 49 \cot 64}$

$=-1 +3(\cot^{2} 67 - \sec ^{2}63) (\because \tan\Theta*\cot \theta=1;cot^{2}\theta-\csc^{2}\theta=-1 )$

$=-1 +3(\cot^{2} 67 - \sec ^{2}63)$

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