Establish the identity.cos
= -sin x
What will be an ideal response?
cos 
= cos x cos 
- sin x sin 
= (cos x)(0) - (sin x)(1) = - sin x.
Mathematics
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Find the measure of one interior angle of the polygon.
A. 120° B. 60° C. 108° D. 540°
Mathematics
Find the value of the determinant.
A. a2 - b2 B. a2 + b2 C. 2ab D. 0
Mathematics
Solve the problem.A stack of poles has 36 poles in the bottom row, 35 poles in the next row, and so on, with 10 poles in the top row. How many poles are there in the stack?
A. 555 B. 611 C. 631 D. 621
Mathematics
Find the value of the expression.log216
A. 16 B. 8 C. 4 D. 2
Mathematics