Write tan(t)/cos(t) in terms of sin(t)

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

What is the lcm of 16 and 40 ? 24 and 40 ?

Solve the following simultaneous equation by using an algebraic method (either substitution or elimination) 2x + 3y=-4 4x-y=11