1.

Trigonometry class 10 ​

Answer»

(ii) →sin^4A-cos^4A→(sin^2A)^2-(cos^2A)^2→(sin^2A-cos^2A)(sin^2A+cos^2A)→(sin^2A-Cos^2A)(1)→(sin^2A-cos^2A)Formula USED1) a^2-b^2=(a+b)(a-b)IDENTITY used1) sin^2A+cos^2A=1Hope it will HELP you.



Discussion

No Comment Found

Related InterviewSolutions