Question

cos6 x + sin6x का मान क्या होगा?
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Answer 1

Answer:

cos^6∅ + sin^6∅

=( cos²∅)³ + (sin²∅)³

=( cos²∅+ sin²∅)³ - 3sin²∅vos²∅( cos²∅ + sin²∅)

since, sin²∅ + cos²∅ = 1

so ,

1³ - 3sin²∅cos²∅*1

= 1 - 3sin²∅cos²∅

Step-by-step explanation:

formula used = a³ + b³ = ( a + b)³ - 3ab ( a+ b)