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The angles A, B, C of a triangle ABC sat...

The angles A, B, C of a triangle ABC satisfy `4cosAcosB + sin2A + sin2B + sin2C = 4`, Then which of the following statements is/are correct? (1) The triangle ABC is right angled (2) The triangle ABC is isosceles (3) The triangle ABC is neither isosceles nor right angled (4) The triangle ABC is equilateral

A

The triangle ABC is right angled

B

The triangle ABC is isosceles

C

The triangle ABC is neither isosceles nor right angled

D

The triangle ABC is equilateral

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The correct Answer is:
A, B
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