Mathematics: Post your doubts here!

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Snowysangel

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RoOkaYya G said:
find normal (n hat) by doing cross product with the direction of line l and the directon vector A.

replace in the formula r. n hat = a . n hat

a can be the point in line equation (4,-2,2)

replace n u get the answer.
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That's the normal to the plane right? How do you find it?
 
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Snowysangel

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RoOkaYya G said:
cross product of direction of line n direction vector A
i mentioned it there :)
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Yeah what's the general equation for it? Is it the cross product of the position vector of any point on a plane and the direction vector? Isn't the direction of line l the same as the direction vector A?
 
Salman Shah Jee

Salman Shah Jee

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When it says , Find all the roots in the interval (-180 < x <180) of the following equations : 1) 4 sin X = 5 cosX 2) cos3X =2/3
Now what is the difference between cos3X and 3cos X? Are they both same? . And which roots lie in the interval ( -180 < x < 180)??????...What does -180 means? Plzzz solve both question step by step.Thanks
 
The Sarcastic Retard

The Sarcastic Retard

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Salman Shah Jee said:
When it says , Find all the roots in the interval (-180 < x <180) of the following equations : 1) 4 sin X = 5 cosX 2) cos3X =2/3
Now what is the difference between cos3X and 3cos X? Are they both same? . And which roots lie in the interval ( -180 < x < 180)??????...What does -180 means? Plzzz solve both question step by step.Thanks
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Answered everything.Save it and then zoom it if its not clear it wont blur much.
10799745_10204716515781778_2090623575_n.jpg
Source :
saaas.png
If any doubts, don't hesitate for asking.
 
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The Sarcastic Retard

The Sarcastic Retard

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ahmed butt said:
can anyone tell me how to study math as level pure math and stats 1
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RoOkaYya G said:
practice papers a lot.
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Thought blocker said:
Understanding concepts and applying them into exercise and papers is the way. All the best.
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As the above posts; Exercise is the key to success in As and A level Mathematics you can then say its quite straight forward. As long as you have extra time to splurge on exercises then you're good to go. One more thing you need to understand all theories first for that. For that, pay attention in your class when you're been taught something. Do revise it and clear your doubts asap. That's all can make you to knock the A's of As and A level Mathematics.
 
ahmed butt

ahmed butt

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The Sarcastic Retard said:
As the above posts; Exercise is the key to success in As and A level Mathematics you can then say its quite straight forward. As long as you have extra time to splurge on exercises then you're good to go. One more thing you need to understand all theories first for that. For that, pay attention in your class when you're been taught something. Do revise it and clear your doubts asap. That's all can make you to knock the A's of As and A level Mathematics.
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what do you mean by exercise physical or questions
 
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