1) determine an equivalent expression to sin(2x-pi) a) 2sinxcosx b) -2sinxcosx c

Question

1) determine an equivalent expression to sin(2x-pi)     a) 2sinxcosx     b) -2sinxcosx     c) cos^2x - sin^2x     d) sin^2x - cos^2x 2) A fair coin is tossed 60 times. Using the normalapproximation to the binomial distribution, calculate theprobability that a head will show between 32 and 36 timesinclusive. a) 0.2421 b) 0.3026 c) 0.3032 d) 0.3037 1) determine an equivalent expression to sin(2x-pi)     a) 2sinxcosx     b) -2sinxcosx     c) cos^2x - sin^2x     d) sin^2x - cos^2x 2) A fair coin is tossed 60 times. Using the normalapproximation to the binomial distribution, calculate theprobability that a head will show between 32 and 36 timesinclusive. a) 0.2421 b) 0.3026 c) 0.3032 d) 0.3037

Explanation / Answer

I can help you with the first one. Recall that 1) Sin( ± ) = sincos ±cossin 2) sin() = 0 3) cos() = -1 4) sin(2x) = 2sinxcosx If you use these you will get the correct anwser

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