Math, asked by anandaish699, 9 months ago

Tan square theta× cos square theta=1- cos square theta

Answers

Answered by thiru88529
0

Answer:

is also 1 because theta belongs 0°

Answered by AntonyLigin
1

Answer:

Let us take the LHS,

 \tan {}^{2}  \alpha  \times cos {}^{2}  \alpha  =  \frac{sin {  }^{2}  \alpha }{ cos {}^{2}  \alpha   }  \times cos { \alpha  }^{2}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  = sin {}^{2}  \alpha \\    \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  = 1 - cos {}^{2}   \alpha  \:  \:  \:  \: (since \: sin {}^{2}  \alpha  + cos {}^{2}  \alpha  =1 \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  > sin { }^{2}  \alpha  = 1 - cos {}^{2}  \alpha )

Hence proved. Plz consider alpha as theta.

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