Math, asked by Indrajith8186, 9 months ago

Evaluate sin 20 degree - cos 70 degree

Answers

Answered by rakhichiragpa9pli

1

Answer:0

Step-by-step explanation:

sina=cos(90-a)

sin20=cos(90-20)

sin20=cos70.

now,

sin20-cos70=cos70-cos70

=0

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