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Math 11 Chapter 12
Application of Trigonometry
Test - 1
1.
Area of triangle in terms of the measures of two sides and included angle is __________.
a) 1 /2 bc tan e.t.c.
b) 1 /2 bc cosin e.t.c.
c) 1 /2 bc sin e.t.c.
d) 1 /2 bc cos e.t.c.
2.
With usual notations, radius of e-circle is opposite to vertex A is, _________.
a) Δ / s+a
b) Δ / s-a
c) Δ / s-c
d) Δ / c-a
3.
For, any equilateral triangle having side of measure a, the value of S is
a)
Ö
3a/2
b) 3/4 a
2
c) 3a/2
d) a /
Ö
3
4.
The values of sin
q
, sec
q
and tan
q
go on increasing as
q
increases in _________ quadrant.
a) Ist
b) 3rd
c) 4th
d) 2nd
5.
Hero's formula .
a) Δ= √S(s-a)(s-b)(s-c)
b) Δ= √S(s-a)(s-b)(s+c)
c) abc / 4Δ
d) b = a / Sinβ Sinα
6.
In circle is the circle which touches one side of triangle externally and two sides internally when produced.
a) False
b) True
7.
In any triangle if a = 2, c = 32 γ= 30
o
, sin α is
a) 32
b) 1/16
c) 1/32
d) None of these.
8.
The law of sines is
a) R = abc/Δ
b) √S(s-a)(s-b)(s-c)
c) r / Δ - a
d) a / Sinα = b / Sinβ = c / Sinγ
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