Question 1160135
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(1) Use {{{cos(x) = 8/17}}} and {{{sin(x)^2+cos(x)^2=1}}}, and the fact that the terminal side of the angle is in quadrant IV, to find {{{sin(x) = -15/17}}}.<br>
(2) {{{sin(2x) = 2sin(x)cos(x)}}}
(3) {{{cos(2x) = cos(x)^2-sin(x)^2}}}
(4) {{{tan(2x) = sin(2x)/cos(2x)}}}<br>