` 9/pi e^(pi//3)`
`pi/3 e^(pi//3)`
`pi/9 e^(pi//3)`
None of these
right-angled
equilateral
isosceles
right-angled isosceles
`\frac{7\pi}{12}`
`\frac{2\pi}{3}`
`\frac{5\pi}{6}`
`\frac{\pi}{2}`
is equilateral
is right-angled isosceles
has angles `30^(circ), 60^(circ)` and `90^(circ) `
None of these
`pi/2`
`pi//4`
`2pi//3`
`pi//3`
`sqrt2`
`(sqrt3 + 1)/2`
`(sqrt3 - 1)/2`
`1`
equilateral
acute angled but not equilateral
obtuse angled
right angled
right angled
isosceles
acute
equilateral
`45^(0)`
`60^(0)`
`75^(0)`
`90^(0)`
`sin(A+B)`
`sin(A-B)`
`cos(A+B)`
`cos(A-B)`
the altitudes are in AP
the altitudes are in HP
the angles are in AP
the angles are in HP
`a^2 + b^2 - c^2`
`c^2 + a^2 - b^2`
`b^2 - a^2 - c^2`
`c^2 - a^2 - b^2`
`p^2 + q^2 + r^2`
`p^2 + r^2 - q^2`
`q^2 + r^2 - p^2`
`p^2 + q^2 - r^2`
HP
Arithmetico-Geometric Progression
AP
GP
GP
AP
HP
Neither in GP nor in AP nor in HP
`sin^2B`
`cos^2A`
` cos^2B`
`sin^2A`
`90^@`
`60^@`
`45^@`
`30^@`
equilateral
acute angled but not equilateral
obtuse angled
right angled
`15`
`13/2`
`15/2`
`6`
`170/60`
`181/60`
`190/60`
`191/60`
`3a`
`3b`
`2c`
`3(a + b + c)`
`r^2`
`2r^2`
`3 r^2`
`4 r^2`