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Find the exact value by using a half-angle identity.

sin 75 degrees
Find cos(A+C) given that cos A = 1/3 with A in quadrant I, and sin C = 1/4, with C in quadrant II.
which quadrant will theta lie in if sin theta < 0 and tan theta < 0
sin theta + cosec theta}whole square + cos theta + sec theta }whole square = ???
solve for the Given Variables

T=D+pm for m
You are purchasing a CD player at a markdown price of $127.50. If the markdown price was 15% off the original price, how much was the CD player originally?
A rectangular floor has a perimeter of 54 feet. If the length is 3 more than the width, what are the dimensions of the floor?
The heights in inches of three basketball players are 3 consecutive integers. If the sum of twice the 1st, 3 times the 2nd, and the 3rd is 437, what are the three heights.
In last night’s basketball game, Sally scored 9 less than twice what Lucy scored. The sum of their scores is 27. How many points did Sally and Lucy make individually?
solve the following

(6)/(x^2-8x) - 3/x
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