1
MHT CET 2023 13th May Evening Shift
MCQ (Single Correct Answer)
+2
-0

If $$\mathbf{a}, \mathbf{b}, \mathbf{c}$$ are non-coplanar unit vectors such that $$\mathbf{a} \times(\mathbf{b} \times \mathbf{c})=\frac{\mathbf{b}+\mathbf{c}}{\sqrt{2}}$$, then the angle between $$\mathbf{a}$$ and $$\mathbf{b}$$ is

A
$$3 \pi / 4$$
B
$$\pi / 4$$
C
$$\pi / 2$$
D
$$\pi$$
2
MHT CET 2023 13th May Evening Shift
MCQ (Single Correct Answer)
+2
-0

$$\int \frac{2+\cos \frac{x}{2}}{x+\sin \frac{x}{2}} d x=$$

A
$$2 \log \left(x+\sin \frac{x}{2}\right)+c$$, where $$c$$ is constant of integration
B
$$\frac{1}{2} \log \left(x+\sin \frac{x}{2}\right)+c$$, where $$c$$ is constant of integration
C
$$4 \log \left(x+\sin \frac{x}{2}\right)+c$$, where $$c$$ is constant of integration
D
$$\log \left(x+\sin \frac{x}{2}\right)+c$$, where $$c$$ is constant of integration
3
MHT CET 2023 13th May Evening Shift
MCQ (Single Correct Answer)
+2
-0

In $$\triangle A B C$$, with usual notations, if $$\frac{b+c}{11}=\frac{c+a}{12}=\frac{a+b}{13}$$, then the value of $$\cos A+\cos B+\cos C$$ is

A
$$17 / 35$$
B
$$51 / 35$$
C
$$5 / 7$$
D
$$19 / 35$$
4
MHT CET 2023 13th May Evening Shift
MCQ (Single Correct Answer)
+2
-0

If slope of the tangent to the curve $$x y+a x+b y=0$$ at the point $$(1,1)$$ on it is 2, then the value of $$3 a+b$$ is

A
3
B
1
C
2
D
$$-$$1
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