AP EAMCET · Maths · Properties of Triangles
In a triangle , if and , then is equal to
- A
- B
- C
- D
Answer & Solution
Correct Answer
(B)
Step-by-step Solution
Detailed explanation
Given, 3sinA+4cosB=6 and 4sinB+3cosA=1 On squaring and adding both the equations we get, 3sinA+4cosB2+4sinB+3cosA2=62+12 ⇒9sin2A+16cos2B+24sinAcosB+16sin2B+9cos2A+24sinBcosA=37 ⇒9sin2A+cos2A+16cos2B+sin2B+24sinAcosB+sinBcosA=37 Using sin2A+cos2A=1 and…
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