CBSE Class 10-Mathematics: Chapter –8 Introduction to Trigonometry Part 11

Get top class preparation for CBSE right from your home: fully solved questions with step-by-step explanation- practice your way to success.

Question6:

If and

, find A and B

Answer

(i) False, because

And

(ii) True, because

Introduction to Trigonometry

It is clear, the value of increases as increases.

(iii) False, because

Introduction to Trigonometry

It is clear, the value of decreases as increases

(iv) False as it is only true for .

True, because and

i.e. undefined

Question7:

Choose the correct option. Justify your choice:

(i)

(A)

(B)

(C)

(D)

(ii)

(A)

(B)

(C)

(D) None of these

(iii)

(A)

(B)

(C)

(D)

(iv)

(A)

(B)

(C)

(D) None of these

Answer:

(i)

(B)

(ii)

(C)

(iii)

(D)

(iv)

(D)