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प्रश्न
Evaluate:
cos600 cos300− sin600 sin300
उत्तर
On substituting the values of various T-ratios, we get:
cos600 cos300− sin600 sin300
=`(1/2 xx sqrt(3)/2-sqrt(3)/2 xx1/2)=(sqrt(3)/4 - sqrt(3)/4)=0`
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