Day 486: MHT-CET Maths

1. A.
   sin A, sin B, sin C are in arithmetic progression.
2. B.
   $a^2, b^2, c^2$ are in arithmetic progression.
3. C.
   cos A, cos B, cos C are in arithmetic progression.
4. D.
   a, b, c are in arithmetic progression.

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1. A.
   $\sqrt{3}$
2. B.
   $\frac{1}{\sqrt{3}}$
3. C.
   $\frac{1}{2\sqrt{3}}$
4. D.
   $2\sqrt{3}$

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1. A.
   B and E are meaningful
2. B.
   A and D are meaningful
3. C.
   B, C and E are meaningless
4. D.
   A is meaningful but B is meaningless

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1. A.
   $2c\sqrt{ab}$
2. B.
   $2ab\sqrt{c}$
3. C.
   $- 2c\sqrt{ab}$
4. D.
   $2c(ab)$

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1. A.
   $45^{\circ}$
2. B.
   $60^{\circ}$
3. C.
   $30^{\circ}$
4. D.
   $90^{\circ}$

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