solve the trigonometric equation
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= cosec^2 67 - tan^2 23
= sec^2 23 - tan^2 23 (cosec^2A = sec^2(90-A)
= 1 (sec^2A-tan^2A = 1)
hope it helps!!
= sec^2 23 - tan^2 23 (cosec^2A = sec^2(90-A)
= 1 (sec^2A-tan^2A = 1)
hope it helps!!
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