I am having a serous issue with these two problems. No matter what formula's I use i keep getting the wrong answer. I NEED HELP BADLY.
1.) Use a sum or difference formula or a half angle formula to determine the value of the trigonometric functions. Give exact answers. Do not use decimal numbers. The answer should be a fraction or an arithmetic expression. If the answer involves a square root it should be enter as sqrt; e.g. the square root of 2 should be written as sqrt(2);
sin((11pi)/8) =
sin(-(pi/12)) =
cos((3pi)/8) =
cos((11pi)/8) =
&
2.) If cos(t) = - (3/5) where pi < t < ((3pi)/2), find the values of the following trigonometric
Give exact answers, do not use decimal numbers. The answer should be a fraction or an arithmetic expression. If the answer involves a square root it should be enter as sqrt; e.g. the square root of 2 should be written as
sqrt(2).
cos(2t) =
sin(2t) =
cos(t/2) =
sin(t/2) =
Any and all Help greatly appreciated
~Kiba~