Sunday

December 21, 2014

December 21, 2014

Posted by **Stumped Student** on Saturday, September 22, 2007 at 9:38pm.

Note: Give exact answers, do not use decimal numbers. The answer should be a fraction or an arithmetic expression.

a) cos (2t)

b) sin (2t)

c) cos(1/2)

d) sin (1/2)

i dont even know what this question is asking me to find!

- CALCULUS -
**bobpursley**, Sunday, September 23, 2007 at 5:03amI will do one for you. It is asking you to apply the double and half angle formulas.

Cos2t=sin^t -cos^2 t

Now do you know how to get the sint, given cost?

Use pythoregean theorm.

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