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CUET
General Test
Quantitative Reasoning
Trigonometry
If A + B = 45°, then the value of 2(1 + tan A)(1 + tan B) is:
2
0
4
1
2(1 + tan A)(1 + tan B)
A + B = 90º { given }
Let A = 0º & B = 45º = 2(1 + tan 0º)(1 + tan 45º)
= 2(1 + 0)(1 + 1) { tan 45º= 1 }
= 4