Q 1 In △ABC, if sin2A2-sin2B2+sin2C2+2cosA2sinB2cosC2=k, the value of k is A 1 B 2 C - Maths - Trigonometric Functions

Question

Q 1 In △ A B C ,   i f   sin 2 A 2 - sin 2 B 2 +
sin 2 C 2 + 2 cos A 2 sin B 2 cos C 2 = k , the value of k is
A 1
B 2
C - 1
D - 2

Lovina Kansal · Accepted Answer

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Q.1. In △ A B C , i f sin 2 A 2 - sin 2 B 2 + sin 2 C 2 + 2 cos A 2 sin B 2 cos C 2 = k , the value of k is A. 1 B. 2 C. - 1 D. - 2