Math, asked by AmiteshSinha, 1 year ago

prove that :Cos^3 20+sin^3 10=3/4(cos20+sin10) please solve

Answers

Answered by GauravGumber

4

as a³+b³=(a+b)(a²+b²-ab)
so cos³20+sin³10=(cos20+sin10)(cos²20+sin²10-cos20sin10)
solve further to get answer

AmiteshSinha: pls solvee

AmiteshSinha: all

AmiteshSinha: pahle banadijiye use k bad pic vejdijiye

GauravGumber: OK I WILL SOLVE IN EVENING DEAR

AmiteshSinha: thank u

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