# DIRECTIONS COSINES AND DIRECTION RATIOS INTER FIRST YEAR MATHS FIRST YEAR 1B PROBLEMS WITH SOLUTIONS ( class 11 maths)

Solutions for intermediate mathematics first year 1B some problems  for examination purpose.

The solutions are very simple to understand.

You should study the textbook lesson Direction cosines and Direction ratios very well

You should also observe the solutions given below and try them in your own method.

Textbook solutions for

Inter Maths 1A textbook solutions

Inter Maths 1B textbook solutions

Inter Maths IIA textbook solutions

Inter Maths IIB textbook solutions

Direction Cosines and Direction Ratios

Exercise 6(a)

Exercise 6(b)

Model papers for maths SSC class 10 and Inter

## DIRECTIONS COSINES AND DIRECTION RATIOS INTERMEDIATE 1ST YEAR MATHS 1B PROBLEMS WITH SOLUTIONS ( class 11 maths)

Class 11 math solution ( Inter 1st year maths 1B)

3. Show that the lines whose direction cosines are given by l + m + n = 0, 2mn + 3n -5lm = 0 are perpendicular to each other.

Find the angle between the diagrams of a cube

8. The vertices of a triangle are A (1, 4, 2),  B (- 2, 1, 2) , C (2, 3, – 4). Find angles A, B and C.

Note : Observe the solutions and try them in your own methods.

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1. Locus

The straight line sa

Straight lines la

11. Rate measure

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