Angles ∝ and β are the two acute angles in a right triangle. use the relationship between sine and cosine to find the value of ∝ if ∝ > β. sin( 5x 3 + 20) = cos( 2x 3 + 14)

Sin(5x³+20)=cos(90-(5x³+20))=cos(2x³+14), so 70-5x³=2x³+14, 56=7x³, x³=8, x=2.5x³+20=60º, so the other angle is 30º. ∝=60º, β=30°.

Yes i also think it is b

Answer: the correct answer is 10step-by-step explanation: let the number be n, then the expression becomes,then“twelve more than the quotient of a number and two, decreased by four” iswhen n=4,we substitute 4 whetever we see n to get,we simplify to obtain,we further simplify to get,therefore the correct answer is c.