Long Question Answer. (Marks: 5)
Show that: tan 70º--tan 20° = 2tan 50°
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Answer:
25 degree
Step-by-step explanation:
tan 70 degree - tan 20 degree = 2 tan 50 degree
tan (90 - 70) - tan 20 degree = 2 tan 50 degree
tan 20 degree - tan 20 degree = 2 tan 50 degree
0 degree = 2 tan 50 degree
2 tan 50 degree = 0
tan = 50/2
tan = 25 degree
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