Book: RD Sharma - Mathematics (Volume 1)
Chapter: 4. Inverse Trigonometric Functions
Subject: Maths - Class 12th
Q. No. 2 of Exercise 4.8
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2
Prove the following results:
Let 
and 
⇒ 
and 
where 
Now, LHS is reduced to : cos(x+y)
⇒ 
..eq(i)
As 
where 
⇒ 
⇒ 
⇒ 
Also, 
where 
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
where 
⇒ 
⇒ 
Putting the values in eq(i),
⇒ 
⇒ 
= RHS
Chapter Exercises
More Exercise Questions
3
Solve: 
4
Solve: 
