sin²34 + sin²56 + 2 tan18 tan72 - cot²30
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Sin*2 34 +cos*2(90-56)+2tan18 cot(90-18)-cot*230
Sin*2 34+cos*2 34+2tan18 cot18-3/4
1+2-3/4. Sin *2 theta + cos*2 theta is1
9/4
Sin*2 34+cos*2 34+2tan18 cot18-3/4
1+2-3/4. Sin *2 theta + cos*2 theta is1
9/4
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