CBSE Class 10-Mathematics: Chapter –8 Introduction to Trigonometry Part 10
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Question 4:
In right angles at B, if , find value of
(i)
(ii)

Consider a Triangle ABC
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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 .

Determine the Values
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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