CUET Preparation Today
CUET
General Test
Quantitative Reasoning
Trigonometry
If sin (7α - 20°) = cos (20° - 5α) then the value of tanα .
2
-1
1
0
[Concept: sin A = cos` B, when A + B = 90°]
Therefore,
(7α - 20° + 20° - 5α) = 90°
2α = 90°
α = 45°
Put this value in find →
⇒ tanα
⇒ tan45°
= 1
