It’s c. Where the two planes intersect
Answer:
If you've learnt sin(A+B) = sinAcosB + cosAsinB,
sin(4u)
= sin(2u+2u)
= sin(2u)cos(2u) + cos(2u)sin(2u)
= 2 sin(2u) cos(2u).
Lol this is hard try using multiplication or division...
Step-by-step explanation:
By using Pythagoras theoram,
x²= (6)²+(4)²




optionD