Question

[1]
2. Attempt all the parts.
(a) If cos (3-20°) = sin (3x -10° ), then find the value of x.[1]​

Answer 1

Write cos(teta) as sin(90-teta), that's it, make sure u dont get confused with angle and number,thats it, after that equate the angles, u can get ur x value, solve it