A1:4
B2:1
C1:2
D1:1
Answer:
D. 1:1
Read Explanation:
sin2A+cos2A=1
sin2A=cos2(90−A)
cos2A=sin2(90−A)
cos233+cos257sin222+sin268
cos233+sin233sin222+cos222
1:1
A1:4
B2:1
C1:2
D1:1
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