AP EAMCET · Maths · Trigonometric Equations
If , then
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
Given, A+B+C=π Now, cosB=cosAcosC ⇒cosπ-A+C=cosAcosC ⇒-cosA+C=cosAcosC ⇒cosAcosC-sinAsinC=-cosAcosC ⇒sinAsinC=2cosAcosC ⇒tanAtanC=2.
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