RD Sharma - Mathematics

Book: RD Sharma - Mathematics

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

Subject: - Class 11th

Q. No. 14 of Exercise 7.1

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14

If tanA = 5/6 And tanB = 1/11, prove thatA +B = π/4.

Given


We know that





= 1


tan(A +B) = tan π/4


A + B = π/4


Hence proved.


Chapter Exercises

More Exercise Questions

6

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)