The value of $${cosec^2} 18° -{1\over cot^272°}$$.
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Q:
The value of $${cosec^2} 18° -{1\over cot^272°}$$.
- 1$${1 \over \sqrt { 3}}$$false
- 2$$ \sqrt2\over {3 } $$false
- 3$${1\over2} $$false
- 41true
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