6. Trigonometric Identities and More Equations
6. Trigonometric Identities and More Equations / Sum and Difference Identities / Problem 8
Under the given circumstances, determine the exact value of the expression provided:
sin(A +B), sinA = -1/7, π < A < 3π/2 and cosB = -1/7, π < B < 3π/2
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