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You are not logged in. #1 20081206 01:45:15
High Scohol Mathematics  Trignometry II1. Using the formula sin(AB) = sinAcosB  cosAsinB, find the value of sin 15°. by using the formula . 3. The measure of angle of depression of the bottom of a building on a level fround from the top of the tower is 60° . How far is the building from the tower? 4. A tower is 100/√3 meters high. Find the angle of elevation if the point of observation is 100 meters away from its foot. 5. As observed from the top of a light house, 100 meters high above sea level, the angle of depression of a ship, sailing directly towards it, changes from 30° to 45° . Determine the distance travelled by the ship during the period of observation. Character is who you are when no one is looking. #2 20081206 06:42:58
Re: High Scohol Mathematics  Trignometry IIQ3. Half the height of the tower. #3 20081206 15:31:37
Re: High Scohol Mathematics  Trignometry IIOOps! I am sorry, I forgot to mention in #3 that the tower is 50 meters high. Character is who you are when no one is looking. #4 20090904 07:04:11
Re: High Scohol Mathematics  Trignometry IIHi ganesh #5 20090907 00:06:40
Re: High Scohol Mathematics  Trignometry II#3. 28.86751346 meters. The eclipses from Algol (an eclipsing binary star) come further apart in time when the Earth is moving away from Algol and closer together in time when the Earth is moving towards Algol, thereby proving that the speed of light is variable and that Einstein's Special Theory of Relativity is wrong. 