# Trig equation

#### Albi

##### Junior Member
cos(3x-π/4)=sin(x)
Can someone help me solve this equation?

#### Subhotosh Khan

##### Super Moderator
Staff member
cos(3x-π/4)=sin(x)
Can someone help me solve this equation?
Use the identity:

$$\displaystyle sin[x] = cos[(4n+1)\frac{\pi}{2} \ - \ x]$$

Please show us what you have tried and exactly where you are stuck.

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