RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 7. Values of Trigonometric Functions at Sum of Difference of Angles

Subject: - Class 11th

Q. No. 2 of Exercise 7.1

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If sinA = 3/5, cosB = –12/13, where A And B Both lie in second quadrant, find the value of sin(A +B).

Given sinA = 3/5 And cosB = -12/13

A And B lie in the second quadrant.

So sine function is positive And cosine function is negative.

We know that

Now consider sin(A +B),

sin(A +B)

Chapter Exercises

More Exercise Questions


If SinA = 1/2, cosB = , where π/2<A < π And 0 <B < π/2, find the following:

(i) tan(A +B)(ii) tan(A -B)