Question

Prove that 8(cos6p+sin6p)=5+3cos4p

Answer 1

Step-by-step explanation:

8(sin6P+cos6P)=5+3cos4P. Explanation: As a3+b3=(a+b)(a2+b2−ab). 8(sin6P+cos6P). = 8(sin2P+cos2P)(sin4P+cos4P−sin2Pcos2P).

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