Qualification > Math

C3 and C4 DOUBTS HERE!!!

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Malak:

--- Quote from: astarmathsandphysics on November 11, 2011, 02:38:28 pm ---theta =21.47 or 158.53
see attachment. Only sin theta =(-1+sqrt(3))/2 works cos(-1-sqrt(3))/2 is less than -1

--- End quote ---
Oh god, I just missed one bit O_O

Thankyou

Malak:
Another one:

Cotx = -1.5, find the value of cosecx

Arthur Bon Zavi:

--- Quote from: Crooky :P on November 11, 2011, 03:09:29 pm ---Another one:

Cotx = -1.5, find the value of cosecx

--- End quote ---

Sorry. I was late for that.

1 + cot2x = cosec2x
1 + (-1.5)2 = cosec2x
cosec x = 1.802775638 = 1.80

astarmathsandphysics:
I forgot theta=0

Malak:
For some reason, i cant work this out or more like simplify it O_O

Differentiate (product rule): x(1 + 3x^5)

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