Question

$\large\mathbf{HEY\: QUESTION❤}$


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Answer 1

Step-by-step explanation:

sin^2A+cos^2A=1

Value of Tan45°=1

Answer 2

[tan20°/cosec70°]²+ [cot20°/sec70°]² + 2 tan75° tan45° tan 15°.

As we know that,

We can write equation as,

→ [tan20/cosec(90° -20°)]²+ [cot20% sec(90° -20°)]²+ 2 tan75° (1) tan (90° - 75°).

→ [tan20°/sec20°]²+ [cot20°/cosec20°]² +2

tan75° cot 75°.

[sin20°/cos20°/1/cos20°]² + [cos20°/ sin 20°/1/sin20°] + 2 tan 75° X 1/tan 75°.

→ [sin²20°] + [cos²20°] +2.

→ 1 + 2.

I think that's correct :)