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Using Trignometric Formulaes
Last updated at Dec. 6, 2019 by Teachoo
Ex 7.1, 20 2 3 sin cos 2 2 3 sin cos 2 = 2 cos 2 3 sin cos 2 = 2 sec 2 3 sin cos . 1 cos = 2 sec 2 3 tan . sec =2 sec 2 3 tan sec = +