isaiahmuniz01 isaiahmuniz01
  • 03-04-2018
  • Mathematics
contestada

If sin (2x) = cos (7x), then what is the value of x

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calculista
calculista calculista
  • 13-04-2018
we know that

if  sin (2x) = cos (7x)
then
(2x) and (7x) are complementary angles
so
(2x)+(7x)=90----------> 9x=90-------> x=90/9--------> x=10°

the answer is
x=10°
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