sin2x=?, 2sinx .cosx, 2sinx, 2cox, 2tanx, cos2x, 2cosx, cos2x - sin2x, 0, 2sinx, tan2x=?, (2tanx ) / (1-tan2x), (4tanx) / (1+tan2x), 2cotx, 2tanx, sinx cosy -cosx siny=?, sin(x+y), sin(x-y), cos(x-y), cos(x+y), cosx .cosy -sinx.siny=?, cos(x-y), sin(x+y), cos(x+y), sin(x-y), sin3x=?, 3sinx-4sin3x, 4sin3x-3sinx, 3cosx-4cos3x, 4cos3x-3cosx, 4cos3x-3cosx=?, sin3x, cos3x, tan3x, cot3x, √3 /2 =?, sin60, cos30, cos60, both a & b, both a &c, sin(375º), +ve, -ve, both of them, none of these, degree measure of 5⩞/2, 450, 540, 630, 720, 1+cos2x=?, 2cos2x, 2sin2x, 2tan2x, none of the above, 2sin2x=?, 1+cos2x, 1-cos2x, 1+tan2x, 1-tan2x, tanx is negative in which quadrant ?, 1st & 2nd, 2nd & 3rd, 2nd and 4th, 3rd & 4th, cot (135º)=?, 1, -1, 0, not defined

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