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Lauren G.

asked • 07/31/17

find the exact values of the expressions without solving for x.

If sin(x) = 1/4 and x is in quadrantI,find the exact values of the expressions without solving for x.
 
(a) sin(2x)
(b) cos(2x)
(c) tan(2x)

Carol H.

cos 2x = 2cos2x - 1
sin 2x = 2sinxcosx
tan2x = (2tanx)/(1-tan2x)
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07/31/17

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