Question

solve for x: sin 2x minus sin 4x + sin 6x = zero​

Answer 1

Answer:

sin 2x-sin 4x + sin6x = 0

-sin 2x + sin 6x = 0

sin 4x = 0

cos (90 - 4x) = 0  [because sin a = cos (90-a)]

90 - 4x = 0

4x = 90

x = 15

Step-by-step explanation:

Answer 2

sin2x-sin4x+sin6x=0

sin2x-sin2x=0

sinx= 0

We know that,
sinx= cos(90-x)

Therefore,

x= 90-x

x+x= 90

2x= 90

x= 90/2

x= 45

45 is ur correct answer....

Hope it helps u......