Evaluate \(\begin{vmatrix}cos⁡θ&-cos⁡θ&1\\sin^2⁡θ&cos^2⁡θ&1\\sin⁡θ&-sin⁡θ&1\end{vmatrix}\). - Answer Happy

Evaluate \(\begin{vmatrix}cos⁡θ&-cos⁡θ&1\\sin^2⁡θ&cos^2⁡θ&1\\sin⁡θ&-sin⁡θ&1\end{vmatrix}\).

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answerhappygod: Site Admin; Posts: 899604; Joined: Mon Aug 02, 2021 8:13 am

Evaluate \(\begin{vmatrix}cos⁡θ&-cos⁡θ&1\\sin^2⁡θ&cos^2⁡θ&1\\sin⁡θ&-sin⁡θ&1\end{vmatrix}\).

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Post by answerhappygod » Wed Jul 13, 2022 8:07 pm

a) sin⁡θ+cos2⁡θ
b) -sin⁡θ-cos2⁡⁡θ
c) -sin⁡θ+cos2⁡⁡θ
d) sin⁡θ-cos2⁡⁡θ

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