Question

evaluate (sin70+cos20)(sec70+cosec20)(tan70-cot20)​

Answer 1

Answer:

Step-by-step explanation:

I don't know

Answer 2

Question..

Evaluate (sin70+cos20)(sec70+cosec20)(tan70-cot20)

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Answer..

→ (sin 70+cos 20)(sec 70+cosec 20)(tan 70+cot 20)

→ [sin 70+cos(90-70)][sin(90-20)+cosec 20][tan(90-20)cot 20]

→ (sin 70+sin 70)(cosec 20+cosec 20)(cot 20-cot20)

→ 2sin 70 × 2cosec 20 × 0

→ 0

So, Your answer is 0

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