00:00In the first test, there was a formula of sin 2 theta.
00:04Option A was 2 sin theta cos theta.
00:07Option B was 2 10 theta upon 1 plus 10 squared theta.
00:11And C was both A and B.
00:13The correct answer is both A and B.
00:16This is cos 2 theta.
00:19Option A was 1 minus 10 squared theta upon 1 plus 10 squared theta.
00:24Option B was cos squared theta minus sin squared theta.
00:28Option C was 2 cos squared theta minus 1.
00:31And D was 1 minus 2 sin squared theta.
00:34This answer was all of above.
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