1. equilateral
2. obtuse angled
3. isosceles
4. sinB+cosB=(b+c)/a
sinB+cosB=(b+c)/a
1. 2sin2[(π/4)-α]
2. 2cos2[(π/4)-α]
3. 2cos2[(π/4)+α]
4. 2sin2[(π/4)+α]
2sin2[(π/4)-α]
1. 1400
2. 400 and 1400
3. 400 and 3200
4. 500 and 1300
400 and 3200
1. 2ac/(a2-c2)
2. 2ac/(c2-a2)
3. 2ac/(a2+c2)
4. 2ab/(a2+b2)
2ac/(a2-c2)
1. 2abc
2. a2+b2+c2
3. ab+bc+ca
4. 3abc
2abc
1. (a2-c2)2/2ac
2. (a2+c2)2/2ac
3. (a2+b2)/c2
4. (a2-b2)4/2ab
(a2+c2)2/2ac
1. i-8j+2k
2. –i-8j+2k
3. i-8j-2k
4. i+8j+2k
i-8j+2k
1.
2.
3.
4.
1.
2.
3. 4(7i-j-2k)
4. 4(7i-j+2k)
4(7i-j-2k)
1. (0,0,5)
2. (0,10,5)
3. (0,10/3,5/3)
4. (0,5/2,5/4)
(0,5/2,5/4)