Please solve it

18th

Derivative of 3 sin x +2 sin α w.r.t.x

D is a point on the side BC of equilateral in BC such that BD equal to 1 by 3 BC prove that 980 square equal to 7ab square

Determine whether the relation R on the set of all integers Is reflective, symmetric, anti symmetric, and transitive where ,x, y belongs to R if and only if xy greater than equal to 1

Determine whether the relation R on the set of all integers Is reflective, symmetric, anti symmetric, and transitive where ,x, y belongs to R if and only if xy greater than equal to 1

If non parallel sides of a Trapezium are equal prove that it is cyclic