CBSE Class 10-Mathematics: Chapter –8 Introduction to Trigonometry Part 9
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Question 2:
If , evaluate:
(i)
(ii)

Consider a Triangle ABC
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Answer:
Consider a triangle ABC in which
Let
Then, using Pythagoras theorem,
(i)
(ii)
Question 3:
If , check whether
or not.

Consider a Triangle ABC
Loading image•••
Answer:
Consider a triangle ABC in which .
And
Let .
Then, using Pythagoras theorem,
And
Now, L.H.S.