Math, asked by shabornisarkar, 11 months ago

find the value without using trigonometric tables,
(cos70°/sin20°) + cos57° cosec33° - 2cos60°

Answers

Answered by HumdanKaifee

1

=(cos70/sin(90_70)+cos57.1/sin(90_57)_2cos60

=(cos70/cos70)+cost57. 1/cos57_2cos60

=1+1-2×1/2

=1

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