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| Haven't learned half the stuff on the SAT |
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| Sheepocalypse:
My SATs are tomorrow, and I'm pretty sure I have most of the stuff down -- except for math. I've been doing SAT practice tests all week, and I haven't learned a lot of the material thats on the SATs. Something like this? I've learned about angles of triangles and stuff, but if I was given a question similar to this I wouldn't have a clue of what to do. This? I don't even know what the forget this is saying. Or this. or LITERALLY MOST OF THE TEST. |
| Super Suit 12:
First one's trigonometry. Second one wants you to use algebra to move F to a side by itself. Third one just wants to know what value can replace M and have the thing still be true (meaning equals zero), it's multiple-choice so just try all four choices and see which fits. |
| Aide33:
--- Quote from: Super Suit 12 on April 04, 2017, 05:37:53 PM ---First one's trigonometry. Second one wants you to use algebra to move F to a side by itself. Third one just wants to know what value can replace M and have the thing still be true (meaning equals zero), it's multiple-choice so just try all four choices and see which fits. --- End quote --- no the third one wants you to find the roots of the equation and sum them up, then that will be the answer i'll give you a hint for #1, just draw a triangle with sides that represent sinx = 4/5 remember that sin x = opposite/hypotenuse and cosx = adjacent/hypotenuse also if you don't mind me asking, what grade/level are you in? because I don't know when they teach you basic algebra, but the second one is like 7th grade algebra it should be pretty obvious that they just want you to isolate F |
| Mega-Bear:
--- Quote from: Sheepocalypse on April 04, 2017, 05:34:48 PM ---Something like this? I've learned about angles of triangles and stuff, but if I was given a question similar to this I wouldn't have a clue of what to do. --- End quote --- Have you taken any trigonometry classes? If sin(x) = 4/5 then do the inverse to find x. arcsin(4/5) = x Knowing cos(A - B) = cosA*cosB + sinA*sinB just plug n chug (beer that is, cause you have this test in the bag) edit: and as Aide said, drawing a triangle always helps to visualize trig problems. |
| Aide33:
--- Quote from: Mega-Bear on April 04, 2017, 05:45:12 PM ---Have you taken any trigonometry classes? If sin(x) = 4/5 then do the inverse to find x. arcsin(4/5) = x Knowing cos(A - B) = cosA*cosB + sinA*sinB just plug n chug (beer that is, cause you have this test in the bag) edit: and as Aide said, drawing a triangle always helps to visualize trig problems. --- End quote --- yeah i find actually drawing a triangle helps students understand trig a lot more than just equations pulled out of seemingly thin air, but to each their own |
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