Let A be theta sign.

I. cos A tan A = sin A

II. sin ^2 = 1 - cos^2 A

III. ( sec^2 A ) ( cot A ) = 2csc 2A

and why?

can anybody explain me on this...

thanks

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- Sep 15th 2012, 04:36 AMrcswhich of these are true for acute angles?
Let A be theta sign.

I. cos A tan A = sin A

II. sin ^2 = 1 - cos^2 A

III. ( sec^2 A ) ( cot A ) = 2csc 2A

and why?

can anybody explain me on this...

thanks - Sep 15th 2012, 05:51 AMskeeterRe: which of these are true for acute angles?
all three are true ... review your basic identities