Math, asked by manasvikadambala, 7 months ago

please help me with the third one
In triangle ABC, if angle c = 90°
and BC = 4cm, Cos (A+3) = Cos A Cos B - Sin A Sin B prove that A+B= 90°​

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Answered by mohanasundaram418
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Answer:

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Answered by VivekShyamsukha
0

Answer:

I can not do

Step-by-step explanation:

It is very difficult for me to do

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