Complete the sentence so the result is an identity. Let x be any real number. + tan2x = sec2x
A. 1
B. sin2x
C. cos2x
D. -1
Answer: A
Mathematics
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Find the limit.
A. ? B. -7 C. -8 D. 0
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Solve the problem.In how many ways can you answer the questions on an exam that consists of 11 true-false questions?
A. 2128 B. 2168 C. 1984 D. 2048
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Solve.-2b = 28
A. 30 B. -14 C. -30 D. 1
Mathematics
Multiply.(5a + 4b)2 (5a + 4b)2
A. 625a4 + 2000a3b + 2400a2b2 + 1280ab3 + 256b4 B. 625a4 + 625a3b + 2400a2b2 + 2400ab3 + 256b4 C. 625a4 + 5a3b + 2000a2b2 + 2000ab3 + 256b4 D. 625a4 + 2000a3b + 2400a2b2 + 2000ab3 + 256b4
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