The value of tan 70-tan 20 is
a) 2 tan 50
b) tan 50
c) 2 cot 50
d) cot 50
Answers
Answered by
2
Answer:
a) 2tan 50
Step-by-step explanation:
tan(A-B)=tanA-tanB/1+tanAtanB
tanA-tanB=tan(A-B)×(1+tanAtanB)
tan70-tan20 = tan(70-20)×(1+tan70tan20)
= tan50×(1+tan70/cot70)
= tan50×(1+1)
=tan50×2
=2tan50
Answered by
8
Answer:
Answer is option (a) 2 tan 50
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