Homework Help: trig

Posted by patrick on Saturday, September 15, 2012 at 4:47pm.

(a) sketch an angle A in standard position whose terminal ray passses through the point (1,-4)

(b) Find the exact value of the six trigonometric functions of A,

(c) Let B be the reference angle of A. Find a point on the terminal rsy of B in standard position and add B to your sketch.

trig - Reiny, Saturday, September 15, 2012 at 7:49pm
construct your right-angled triangle by drawing a perpendicular to the x-axis from (1,-4)

then r^2 = x^2 + y^2 = 1 + 16
r = √17

b)
sinA = -4/√17
cscA = -√17/4

cosA = 1/√17
secA = √17

tanA = -4/1 = -4
cotA = -1/4

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