Choose the correct answer x(2x-12x)-2x(x-1x)equals:
-32
32
0
1
Justification of answer:
To simplify : x(2x-12x)-2x(x-1x)
x(2x-12x)-2x(x-1x) =x×2×x-x×12x-2×x×x+2×x×1x
=2x2-1×12×1-2x2+2×1×11 (am÷an=am-n)
=2x2-12-2x2+2
=2x2-2x2+2-12
=2-12
=4-12
=32
Thus, option B is the correct answer
{1(sec2θ−cos2θ)+1(cosec2θ−sin2θ)}(sin2θcos2θ)=1−sin2θcos2θ2+sin2θcos2θ
Determine whether the following numbers are in proportion or not:
13,14,16,17