Answer :

Note: In any ΔABC we define ‘a’ as length of side opposite to A , ‘b’ as length of side opposite to B and ‘c’ as length of side opposite to C .



Key point to solve the problem:


Area of ΔABC = 0.5(product of any two sides)×( sine of angle between them)


• Idea of cosine formula: Cos A =


Given


Cos A =


Area of ΔABC =


We need to find sin A


As we know that - sin2A = 1 – cos2A {using trigonometric identity}


sin A =


ar(ΔABC) = sq units. …ans


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
RELATED QUESTIONS :

In a ΔABC, if <spRD Sharma - Mathematics

For any Δ ABC shoRD Sharma - Mathematics

Two ships leave aRD Sharma - Mathematics

In a Δ ABC cos<suRD Sharma - Mathematics

In any Δ ABC, <spRD Sharma - Mathematics

In a Δ ABC cos<suRD Sharma - Mathematics

Two ships leave aRD Sharma - Mathematics

In any Δ ABC, <spRD Sharma - Mathematics

For any Δ ABC shoRD Sharma - Mathematics

For any Δ ABC shoRD Sharma - Mathematics