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March 4, 2015

March 4, 2015

Posted by **anon** on Friday, February 11, 2011 at 5:54pm.

Express each as a function of theta:

a. sin (270deg + theta)= cos theta

b. cos (pi + theta)= -cos theta

c. tan (810 + theta)= ?????

d. sin (theta - 180)= -sin theta

- trigonometry -
**Damon**, Friday, February 11, 2011 at 7:13pma) I get -cos theta

b) -cos theta yes

c) 810 = 360*2 + 90

so really tan (90+theta) =-cotan (theta)

d) -sin theta is correct

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