Question

if sin +cos =p and sin -cos =q then. a) p= -q. b) p=q. c) p^2+q^2=2 d) p^2-q^2 =2​

Answer 1

Answer:

Option C is correct

Step-by-step explanation:

Psq. +Qsq. =sin²+cos²+2sin.cos+sin²+ cos²-2sin.cos

=since, sin²+cos²=1,1+1=2=rhs

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