Teaching HSSC TGT 2023 Mock Test (Latest Pattern) Mathematics Trigonometry Multiple and Sub-multiple Angles
In a triangle ABC, a = 4, b = 3, c = 2. What is cos 3C equal to ?
1
\(\frac{7}{128}\)
2
\(\frac{11}{128}\)
3
\(\frac{7}{64}\)
4
\(\frac{11}{64}\)
5
Not Attempted