Answer :

Given cosA = -24/25 And cosB = 3/5 where π <A < 3π/2 And 3π/2 <B < 2π


A is in third quadrant And B is in fourth quadrant.


Here, sine function is negative.


We know that






Then,


(i) Sin(A +B)


We know that sin(A +B) = sinA cosB + cosA sinB






(ii) Cos(A +B)


We know that cos(A +B) = cosA cosB - sinA sinB






Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses