Without using tables evaluate : 3 \cos 80^{\circ} \cdot {\cosec} 10^{\circ}+2 \sin 59^{\circ} \sec 31^{\circ}.

ICSE Class X Math 2013 Solved Paper - Question 7

Question : 7 of 46

Marks: +1, -0

Without using tables evaluate :

3 \cos 80^{∘} ⋅ {\cosec} 10^{∘}+2 \sin \;59^{∘} \sec 31^{∘}

Solution:

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