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Question #0a033

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Ratnesh Bhosale

Nov 2, 2016

0

Explanation:

$= cos (- 60) - \frac{tan 135}{tan 315} + cos 660$ $=cos(-60)-tan135/tan315 + cos 660$

$= cos 60 - \frac{tan 45}{tan 45} + cos 60$ $=cos60-tan45/tan45 + cos60$

$= 2 cos 60 - 1$ $=2cos60-1$

$= 1 - 1$ $=1-1$

$= 0$ $=0$

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