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Find the value of sin70°/cos20° + tan25° + sec^2 75° - cot^2 15°- 3tan5°tan7°tan83°tan85°

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Without using tables, find the value of

sin70°/cos20° + tan25° + sec275° - cot215°- 3tan5°tan7°tan83°tan85°

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by (323k points)
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Best answer

=1+1+1-3 x 1 [tan​θcotθ=1, sec2θ​-tan2θ​=1]

=3-3=0

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