Question

sin theta = 8/17 and theta is in the second quadrant. Find sin(2theta),cos(2theta),tan(2theta) exactly


sin(2theta)

cos(2theta)

tan(2theta)
bobpursley
Did it occur to you to find theta first?

Theta=arcsin8/17 =0.489957326 rad in the first quadrant, or in the second quadrant,
PI- 0.489957326 rad= 2.65163533rad
Put each of these in your google search windown:
sin(2* 2.65163533)
cos(2*2.6516)
etc

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