Please solve this problem fast by step by stepsin20sin70 - cos20cos70S – InterviewSolution

1.	Please solve this problem fast by step by stepsin20sin70 - cos20cos70Say answer fast
Answer» -STEP explanation:(cos (90 - 70)sin70 -sin(90 - 20)cos70sin70 sin70 + cos70 cos 70 sin^2 70° + cos^2 70° = 1 BCOZ ( sin^2 A + cos^2 A =1 )

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