Having trouble with my Trig these days. I was wondering if you could help me out?

Q. If AngleBis acute and TanB = $\displaystyle \frac 3{4}$

FindsinB,cosB,sin2Bandtan2BAlso, could anyone help me with another solving for 0 ≤ x ≤ 360 question?

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Q. $\displaystyle 4 - sinx = 4cos^2x$

Methods would be great. Thanks! Always appreciative of response