CBSE Class 10-Mathematics: Chapter – 8 Introduction to Trigonometry Part 10 (For CBSE, ICSE, IAS, NET, NRA 2022)

Get top class preparation for CBSE/Class-10 right from your home: get questions, notes, tests, video lectures and more- for all subjects of CBSE/Class-10.

Question 4:

In right angles at B, if , find value of

(i)

(ii)

Answer:

Consider a triangle ABC in which

Let

Then, using Pythagoras theorem,

For , Base , Perpendicular and Hypotenuse

(i)

(ii)

Question 5:

In , right angled at , and . Determine the values of .

Answer:

In , right angled at Q.

PR + QR = 25 cm and PQ = 5 cm

Let QR = and PR =

Using Pythagoras theorem,

RP² = RQ² + QP²

And