Cosec2 (90- theta) - tan2 theta / 4( cos2 40 +cos2 50) - 2tan2 30 × sec2 52 × sin2 38 / 3( cosec2 70 - tan2 20 ) = 1/36
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I equal to 1/36 bbbxdxuxruxysxydxudxydhdxjdcifctichd hd f fuv
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