sin45cos65+sin135cos115=1. prove it
nikki1231:
in question rhs is zero or one
sorry it was zero...thanks
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given,
sin45cos65+sin135cos115
= sin45cos65 + sin(180-45)cos(180-65)
= sin45cos65+sin45(-cos65)
= sin45cos65-sin45cos65
= 0
I hope you understand
pls mark it as brainliest answer
sin45cos65+sin135cos115
= sin45cos65 + sin(180-45)cos(180-65)
= sin45cos65+sin45(-cos65)
= sin45cos65-sin45cos65
= 0
I hope you understand
pls mark it as brainliest answer
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