In a triangle

MATHEMATICS · Single correct · CBSE · Mathematics · Trigonometric Functions · Trigonometric Functions

Problem

In a triangle ABCABC, if 4cos⁡Acos⁡B+sin⁡2A+sin⁡2B+sin⁡2C=44\cos A\cos B+\sin2A+\sin2B+\sin2C=4, then triangle ABCABC is (1) Right-angled but not isosceles (2) Isosceles but not right-angled (3) Right-angled isosceles (4) Obtuse-angled

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