Math, asked by skaheed81, 1 month ago

please solve this problem fast by step by step
sin20sin70 - cos20cos70
Say answer fast

Answers

Answered by vanitajain410

0

Step-by-step explanation:

(cos (90 - 70)sin70 -sin(90 - 20)cos70

sin70 sin70 + cos70 cos 70

sin^2 70° + cos^2 70°

= 1 bcoz ( sin^2 A + cos^2 A =1 )

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