k well i got 11, but still stuck on the other 2.
for 10 sin(A+B) i got -84/85 but it says im wrong!!! am i? im sure its -84/85. but i did get the cos which was 77/85..
woot i got them all... just 1 prob left which i dont know...
Find the exact value of the following.
sin(165°) =
so its somthing to deal with breaking it up into 2
so it would be like 90-30-45 adn then the 90 cancels out and you find the sin of 30 and 45 and u liek mutiply or somthing i forget. can someone help me on this. and no u cant put this in the calculator..
If I understand correctly then you would be looking for values on your trig circle (pi/2, pi) and then finding the sin values (sqrt2/2 for example.)
step 1) find what 30 and 40 degrees are equal to on the trig circle
step 2) get both sin values
step 3) multiply them both
I believe this is the correct path to follow