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BaLLatris [955]
3 years ago
5

Sin2A + sin2B - sin2C = 4cosA×cosB×cosC​

Social Studies
2 answers:
sweet [91]3 years ago
8 0

Answer:

use sin2A as 2sinAcosA and solve

likoan [24]3 years ago
6 0

Answer:

Inconclusive

Explanation:

Sin2A= Sin(A+A)= SinACosA + CosAsinA=2SinACosA

Similarly

Sin2B= 2SinBCosB

Sin2C=2SinCCosC

Adding all; we cannot arrive at the expression at the right.

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