Question

Fine the answer...
${cos}^{2} 15 - {sin}^{2} 12$

Answer 1

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The answer of u r question is..✌️✌️

✖️Cos^2 15 - Sin ^2 15

Ans:✍️✍️✍️✍️✍️✍️✍️

Given,

${cos}^{2} 15 - {sin}^{2} 15$

We have to view an formula..

${cos}^{2} \: tita \: - {sin \: }^{2} tita = \: cos \: 2 \: tita$

Here,

Tita = 15

=Cos 2 (15)

= Cos 30

$= \frac{ \sqrt{3} }{2}$


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Answer 2

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