Question

find the value of cosec ^2 30° sin^2 45°- sec^2 60°​

Answer 1

Answer:

Here is your answer.

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Step-by-step explanation:

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Correct Question:

Evaluate :

Cosec2 30° - sin2 45° -sec2 60°.

Solution :

We know that,

Cosec 30° = 2, sin45° = 1/√2 and sec60° =  2,

therefore  cosec2 30 × sin2 45° - sec2 60° = 2×2 -1/2-4 = -1/2,

hence cosec2 30°- sin2 45° - sec2 60° =  -1/2,

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Answer 2

Answer:

-2

Step-by-step explanation:

the value of: cosec30=2

                     sin45=1/$\sqrt{2}$

             and  sec60=2

therefore,=(2)^2(1/$\sqrt{2}$)^2-(2)^2

                =4(1/2)-4

                =-2