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nimamiz
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If cos(t)=−3/5 where pi<t<3pi/2, find the values of the following trigonometric functions.
Cos(t/2)
Sin(t/2)
I found the answers but for some reason Cos is negative and sin is positive. Aren't they both supposed to be negative?
 11 months ago
 11 months ago
nimamiz Group Title
If cos(t)=−3/5 where pi<t<3pi/2, find the values of the following trigonometric functions. Cos(t/2) Sin(t/2) I found the answers but for some reason Cos is negative and sin is positive. Aren't they both supposed to be negative?
 11 months ago
 11 months ago

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myininaya Group TitleBest ResponseYou've already chosen the best response.1
Well if pi<t<3pi/2 then pi/2<t/2<3pi/4 And that area of the rectangular coordinate system, cos is negative and sin is positive since x is negative and y is positive there.
 11 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
I just took the inequality given and divided by 2. t/2 is between pi/2 and 3pi/4
 11 months ago

nimamiz Group TitleBest ResponseYou've already chosen the best response.0
ohh. got it thanks buddy
 11 months ago
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