If cos 3x = sin 2x then,x is - a)15° b)30° c)22.5° d)18°
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cos3x=sin2x,
cos3x=cos(90°-2x),
3x=90°-2x,
3x+2x=90°,
then
5x=90°,
x=90°/5=18°✓✓✓✓✓
cos3x=cos(90°-2x),
3x=90°-2x,
3x+2x=90°,
then
5x=90°,
x=90°/5=18°✓✓✓✓✓
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