Qus : 2 NIMCET PYQ 1 Angle of elevation of the top of the tower from 3
points (collinear) A, B and C on a road leading to the
foot of the tower are 30°, 45° and 60°, respectively.
The ratio of AB and BC is
1 $\sqrt(3):1$ 2 $\sqrt(3):2$ 3 $1:\sqrt(3)$ 4 $2:\sqrt(3)$ Go to Discussion NIMCET Previous Year PYQ NIMCET NIMCET 2020 PYQ Solution According to the given information, the figure should be as follows.
Let the height of tower = h
Qus : 6 NIMCET PYQ 2 If A > 0, B > 0 and A + B = $\frac{\pi}{6}$ , then the minimum value of $tanA + tanB$
1 $$\sqrt{3}-\sqrt{2}$$
2 $$\sqrt{3}-2\sqrt{3}$$ 3 $$\frac{2}{\sqrt{3}}$$ 4 $$\sqrt{2}-\sqrt{3}$$ Go to Discussion NIMCET Previous Year PYQ NIMCET NIMCET 2019 PYQ Solution On differentiating x= tanA + tan(π/6-A)
we get :
dx/dA = sec²A-sec²(π/6-A)
now putting
dx/dA=0
we get
cos²(A) = cos²(π/6-A) so 0≤A≤π/6
therefore
A=π/6-A from here we get A = π/12 = B
so minimum value of that function is
2tanπ/12 which is equal to 2(2-√3)
Qus : 12 NIMCET PYQ 1 If $a_1, a_2, a_3,...a_n$, are in Arithmetic Progression
with common difference d, then the sum $(sind) (cosec a_1 . cosec a_2+cosec a_2.cosec a_2+...+cosec a_{n-1}.cosec a_n)$ is equal to
1 $$cot a_1 - cot a_n$$ 2 $$sin a_1 - sin a_n$$ 3 $$cosec a_1 - cosec a_n$$ 4 $$a_1-a_n$$ Go to Discussion NIMCET Previous Year PYQ NIMCET NIMCET 2022 PYQ
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