tiger sucks did any of you watch the video plus ive been killed by one 75 mm round in tiger the 76 mm and 85 77mm were built to counter tiger 75 couldnt kill tiger
http://www.youtube.com/watch?v=XZZ34lVcYAA
I'm hardly a paragon of virtue when it comes to the English language, but capitalisation, punctuation and basic grammar and knowledge of sentence/paragraph may help your argument.
To translate:
"Tiger sucks.
Did any of you watch the video?
Plus, I've been killed by one 75 mm round in Tiger. The 76 mm, 85 mm and 77mm were built to counter the Tiger. I believe the 75 mm couldn't kill the Tiger"
Now that we can understand your argument, we can break it down.
Yes, the 75 mm mounted on the Sherman (as well as several British tanks of the period) was inadequate against the Tiger tank. However, inadequate does not mean completely ineffective.
While there was very little chance of any penetration by the 75 mm frontally, side and rear hits, particularly on the lower hull, could (and did) result in penetrations.
So, the Tiger was not invulnerable to the 75 mm, just highly resistant to it.
Secondly, your belief that the various larger caliber tank cannon were designed to defeat the Tiger is incorrect, at least in the case of the British and the Russians.
The British 17 lbr (which shouldn't be confused with the 77 mm, which is a different weapon) was developed out of a 1940 requirement for a gun to replace the 6 lbr (which was just beginning deployment at the time). Production began in April 1942, well before the Tiger appeared on the battlefield.
The Russian 85 mm tank gun was developed from an existing 85 mm anti aircraft gun, which had been in Soviet service since 1939. Its incorporation into tanks was under consideration in early 1942, but production priorities and the complete dislocation of Soviet military production meant that the 76.2 mm was retained as the primary tank gun until late 1943/early 1944.