Give all degree solutions to the equation sin(7x) − cos(2x) = 0 . Use k as an arbitrary integer. Omit the degree symbol; use commas to separate your answers, use a minimum number of expressions.

Answer 1

same as

sin(7x)=sin(90-2x)

7x=90-2x+360k

x=10+40k

or

7x=180-(90-2x)+360k

x=18+72k