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Question: trigenometry help

Question:trigenometry help

jennifernavarre 8
trigonometry
August 30 2007
0
I am a nursing student and do not understand math very well at all. i need help with 5 math problems . I would greatly appreciate any help out there. thanks in advance.(they are multiple choice problems.) 1) Convert this relationship to a form which has no trigonometric relationships in the answer, just numbers. [2*(tan of 15 degrees)]/[1 - tan^2 of 15 degrees] a) sqrt3 b) 3 c) (sqrt3)/3 d) 3/(sqrt3) 2) Choose the answer which completes the identity below.( i believe this is D, am i correct?) (The square of the tangent of x) + 1 = ? or alternatively written in symbols this is [tan^2(x)] + 1 = ? a) Sin^2(x) + Cos^2(x) b) Cot(x) c) Cos(x) d) Sec^2(x) 3.) Simplify the expression [cot(A)]*[sin(A)] a) Cos(A) b) Sin(A) c) Tan(A) d) Cot(A) 4.) What is the tangent of 105 degrees? (i believe this is D also??) a) 2 + sqrt(3) b) 2 - sqrt(3) c) - 2 + sqrt(3) d) - 2 - sqrt(3) 5.) Solve for x arccos x = arcsin (2/7) Note that since I cannot write "sin to the -1 power" in Educator (or likewise cos to the -1 power), I am using the alternate notation arcsin and arccos, which mean exactly the same thing. (4sqrt5)/7 = (4/7)sqrt5 (2sqrt5)/7 = (2/7)sqrt5 (sqrt5)/7 = (1/7)sqrt5 (3sqrt5)/7 = (3/7)sqrt5
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