sin A+sinB =2 then what is the value of cosA +cosB =??
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Answered by
1
SinA+SinB=2
squaring both sides
Sin^2A+Sin^2B+2SinASinB=4
1+2SinASinB=4
2SinASinB=3
squaring both sides
Sin^2A+Sin^2B+2SinASinB=4
1+2SinASinB=4
2SinASinB=3
Answered by
0
sinA+sinB=2
sinA=sinB=1
A=B=90°
cosA+cosB=0
sinA=sinB=1
A=B=90°
cosA+cosB=0
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