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5. Trigonometric Ratios
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Q34 of 143 Page 5

If tan (A – B) = and tan (A + B) = , 0° < A + B ≤90°, A > B find A and B.


On solving both equations, we get


A = 45° and B = 15°


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32

In a rectangle ABCD, AB = 20 cm, = 60°, calculate side BC and diagonals AC and BD.

33

If sin (A + B) = 1 and cos (A – B) = 1, 0° < A + B ≤90°, A ≥ B find A and B.

35

If sin (A – B) = and cos (A + B) = , 0° < A + B ≤90°, A < B find A and B.

36

In a right angled at B, . Find the values of

(i)


(ii)

Questions · 143
5. Trigonometric Ratios
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