GUYS PLEASE HELP THIS QUESTION IS OF 100 POINTS OF BRAINLY PLEASE HELP
if cosA=sinA ,prove that A and b are vertices of an isosceles triangle
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Answered by
5
Answer:
ANSWER
cosAcosB+sinAsinBsinC≤cosAcosB+sinAsinB
⇒1≤cos(A−B)⇒cos(A−B)=1
⇒A=B and C=
2
π
Hence, it is a right angled isosceles triangle. Hence a is the correct option.
Answered by
1
Answer:
ok wait a bit ..............................
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