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(sin 20 / cos 70) - sin 90
(cos(90- 20) / cos 70) - sin 90
(cos 70 /cos 70) - 1
1 - 1 = 0 ans....
hope u have no doubt
(cos(90- 20) / cos 70) - sin 90
(cos 70 /cos 70) - 1
1 - 1 = 0 ans....
hope u have no doubt
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