tan69°+tan66°+1=tan69°tan66°
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Answer:
Hi ,
************************************
( tanA + tanB )/( 1 - tanAtanB
= tan(A+B )
************************************
( tan69+tan66)/(1-tan69tan66)
= tan( 69 + 66 )
= tan 135
= tan ( 90 + 45 )
= - cot 45
= -1
I hope this helps you.
Step-by-step explanation:
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