Math, asked by sumitparihar0022, 1 year ago

cos20-sin10-sin50=0

Answers

Answered by sharmahoney2964

1

Answer:

cos20-(sin10-sin50)

=cos20-{2sin1/2(10+50)cos1/2(50-10)}

=cos20-{2sin30.cos20}

=cos20-{2×1/2.cos20}

=cos20-cos20

=0Proved

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