Can anyone give me an answer for Tan(-405)= ?
AjayShankar7:
I am really intelligent in Maths when I was in School. But, now ???
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Answered by
4
tan(-x)=-tan(x)
tan(405)=tan(2*pi(180 radian)+45)
-tand(45)
-tan(45)=-1
tan(405)=tan(2*pi(180 radian)+45)
-tand(45)
-tan(45)=-1
I dont know.
However, there is two different speed. So, you need to find Average speed.
2xy/x+y = 2*3*6/3+6 = 36/9 = 4
Speed=4, Time=5, & D=S*T => 4*5=20 KM. In my opinion ans is 20km.
Answered by
4
tan(-θ) = - tanθ
⇒ tan(-405⁰) = -tan (405⁰)
= - tan ( 360⁰ +45⁰)
= -tan 45⁰
= - 1
therefore, tan (405⁰) = -1
⇒ tan(-405⁰) = -tan (405⁰)
= - tan ( 360⁰ +45⁰)
= -tan 45⁰
= - 1
therefore, tan (405⁰) = -1
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