A trigonometry question

• Ahm97sic

  3 Oct 08, 19:49

  This question is fun. Perhaps you will like to solve it.

  Question

  Without using a calculator,

  evaluate tan ( tan-1 2 + tan-1 8)

  (The number in red is in superscript)

  Thank you for your kind attention.

  Regards,

  ahm97sic

• wishboy

  3 Oct 08, 21:13

  

• Ahm97sic

  3 Oct 08, 21:37

  Hi Wishboy,

  Congratulation, your answer is perfectly correct !

  Thank you for your kind attention.

  Regards,

  ahm97sic

  PS : Dear Wishboy, I have noticed that you can type mathematical symbols in the forum and you use a better method than the other forumers. They used to type the mathematical symbols in Microsoft Word or Excel and then print screen and save it as a picture file and then upload it to a website that processes this image before the image file can be inserted into the forum.

  Can you kindly share your method of typing mathematical symbols in the forum with us ? Thanks.

  Hi Wishboy, there is another fun question on logarithm on the thread "A Logarithm Question" in the forum, perhaps you will like to try it too. The question looks difficult and completed but actually it is not complicated or difficult once you discover the trick or the fun part of the question. Just like the above question that you discover the fun part of the question tan-1 (2) = x and tan x = 2 and tan (x + y).

• wishboy

  4 Oct 08, 03:16

  Originally posted by Ahm97sic:

  PS : Dear Wishboy, I have noticed that you can type mathematical symbols in the forum and you use a better method than the other forumers. They used to type the mathematical symbols in Microsoft Word or Excel and then print screen and save it as a picture file and then upload it to a website that processes this image before the image file can be inserted into the forum.

  Can you kindly share your method of typing mathematical symbols in the forum with us ? Thanks.

  the method in blue is what I did

  if u have noticed, that post is actually just an image

• Ahm97sic

  4 Oct 08, 10:59

  Hi Wishboy,

  Thank you for the reply.

  I hope that we can just type mathematical symbols in the forum without going through the entire process.

  Perhaps they can get the IT moderators to do some programming to allow mathematical symbols and drawings to be done in the forum. It will be best if we can just cut and paste from Microsoft Word or Excel.

  Thank you for your kind attention.

  Regards,

  ahm97sic