Math, asked by dasdipi001, 1 year ago

Without using trigonometric table , evaluate
Cos70/sin20+cos59/sin31 - 8sin^2 30

Answers

Answered by anamika21032004

0

Answer:

Step-by-step explanation:

Cos(90-20)/sin20+cos(90-31)/sin31-8(1/2)^2

Sin20/sin20+sin31/sin31-8/4

1+1-2

0

dasdipi001: Without using trigonometric table but u used sin^2 30

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