You can
put this solution on YOUR website! .
Your starting equation is THIS
3*sin(x) - 7 = 5*sin(x) - 6, 0° <= x < 360°.
Simplify it in standard way
-7 + 6 = 5*sin(x) - 3*sin(x) (you collect constant terms in the left side;
you collect sin-terms in the right side).
You get
-1 = 2*sin(x).
It implies
sin(x) = -1/2. (*)
It is a standard equation to determine "x" from the table
or from a standard "unit circle".
x = 210° in QIII (in third quadrant);
x = 330° in QIV (in fourth quadrant).
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| From equation (*), you should get these solutions momentarily |
| from your head: you MUST KNOW IT as the multiplication table. |
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The problem is just solved.
Your original equation has two roots in the given interval.
The solutions are x = 210° in QIII and x = 330° in QIV.
Solved.
You get full explanation from me and complete mantra
to pronounce it when solving such equations.
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