Which value of y makes the two matrices inverses of each other?

Which function has the smallest y-intercept value

If sin θ=24/25 and 0 less than or equal to θ less than or equal to π/2, find the exact value of tan 2θ. answers; a) -527/336 b) -336/527 c)7/24 d) 24/7

Which basic geometric term has no width, no length, and no thickness? line b. point c. angle d. plane