Question

A
and
If A
Cosa
Sind
Sino
Cos o
ß
then determinant of
= A4 +A
A
ß
2​

Answer 1

Step-by-step explanation:

Let △=∣∣∣∣∣∣∣∣C161C101C∣∣∣∣∣∣∣∣=C(C2−1)−1(C−6)=C3−2C+6

Put C=2cosθ we get

△=(2cosθ)3−2(2cosθ)+6

=8cos3θ−4cosθ+6

Answer 2

Answer:

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