Hi mms6
Question 1
Draw a triangle. You have to consider x as acute angle and obtuse angle. Then, use formula :
(Another hint : state the height in term of trigonometry)
Question 2
Factorize LHS then find the critical point
How do I do:
Show that for all x E (0, pi), the area of a triangle with side lengths a and b and with included angle x is A= 1/2(a)(b)(sin x) (Hint: You need to consider two cases.)
and
2sin^2 x - 5sin x + 3 < 0 in interval [0, 2pi)
Can someone help me a bit please :P
Thanks!