How to solve the one which I have ticked ... I.e. Sin^4.....

Asked by paruchuri132l | 25th Oct, 2016, 07:12: PM

Expert Answer:

begin mathsize 16px style sin to the power of 4 theta space minus space cos to the power of 4 space theta space equals space 1 space minus space 2 cos squared theta
L. H. S. space equals sin to the power of 4 theta space minus space cos to the power of 4 space theta space
equals space left parenthesis sin squared theta right parenthesis squared space minus space left parenthesis cos squared space theta right parenthesis squared
equals left parenthesis sin squared theta space minus space cos squared space theta right parenthesis left parenthesis sin squared theta space plus space cos squared space theta right parenthesis
equals sin squared theta space minus space cos squared space theta

R. H. S. space equals space 1 space minus space 2 cos squared theta
equals 1 space minus space cos squared theta space minus space cos squared theta
equals left parenthesis 1 space minus space cos squared theta right parenthesis space minus space cos squared theta
equals space sin squared theta space minus space cos squared theta

H e n c e comma space L. H. S. space equals space R. H. S. end style

Answered by Rashmi Khot | 26th Oct, 2016, 09:18: AM

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