AP EAMCET · Maths · Trigonometric Ratios & Identities
In \(\triangle \mathrm{ABC}\), if \(\cos ^2 \mathrm{~A}+\cos ^2 \mathrm{~B}+\cos ^2 \mathrm{C}=1\), then \(\triangle \mathrm{ABC}\) is
- A an equilateral Triangle
- B an isosceles triangle
- C a right angled triangle
- D a scalene triangle
Answer & Solution
Correct Answer
(C) a right angled triangle
Step-by-step Solution
Detailed explanation
\(\because \cos ^2 \mathrm{~A}+\cos ^2 \mathrm{~B}+\cos ^2 \mathrm{C}=1\)…
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