Given that sin A =, cos B = - , A is a quadrant I angle, and B is a quadrant II angle, find each of the following. (a) sin(A + B) (b) cos(A + B) (c) tan(A – B) (d) the quadrant of A + B

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A: The difference between two numbers is 40. They are in the ratio 9:7. To find each number.

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A: This question can be solved using the concept of trigonometric equation.

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A: In Right angle Triangle ABC ,     cosθ = AdjacentHypotenuse

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