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rocomath
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Homework Statement
Prove the identity
11. 1 - co5xcos3x - sin5xsin3x = 2sin^2x
50. ln |secx + tanx| = -ln |secx - tanx|
52. The following equation occurs in the study of mechanics:
[tex]\sin\theta = \frac{I_1\cos\phi}{\sqrt{(I_1\cos\phi)^2 + (I_2\sin\phi)^2}}[/tex]. It can happen that [tex]I_1 = I_2[/tex]. Assuming that this happens, simplify the equation.
Homework Equations
The Attempt at a Solution
11. Idk what I'm doing wrong
50. GRRR!
53. Can I make this assumption that [tex]\phi = 45^\circ[/tex] and that [tex]\theta = 45^\circ[/tex]?
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