Math, asked by bashokkumar5825, 4 months ago

Whats the value of 80cos40°+120cos70°-150sin35°??

Answers

Answered by singhpriya36381

0

Answer:

cos80o+cos40o−cos20o

=2cos280o+40ocos280o−40o−cos20o ∵cosCo+cosDo = =2cos(2Co+Do)cos(2Co−Do)

=2cos60ocos20o−cos20o

=0

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