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August 20, 2014

August 20, 2014

Posted by **lindsay** on Wednesday, May 2, 2012 at 4:35pm.

a. Sin(x + pi/4 + sin(x - pi/4)= -1

b. Sin(1/3 x+5) = 1/2

- trigonometry -
**Steve**, Wednesday, May 2, 2012 at 4:54pmrecalling that sin pi/4 = cos pi/4 = 1/√2

and

sin(a+b) = sina*cosb + cosa*sinb,

a.

x = 5pi/4 or 7pi/4

b.

x/3+5 = pi/6 or 5pi/6

x = 13pi/2-15

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