Question

Heya !!
Please help me in the 25th question. Pls give step by step complete solution.
NEED DETAILED ANSWER.
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Answer 1

To know the value of theta,

On Dividing sin∅ by cos∅, we get



sin∅ / cos∅ = tan∅ [ as we know ]



cos∅ = sin∅
Putting cos∅ as sin∅


=> sin∅ / sin∅ = tan∅

=> 1 = tan∅



We know, tan45 = 1,

=> tan45° = tan∅

=> 45 = ∅





Now,

2tan²∅ + sin²∅ - 1

=> 2tan²45 + sin²45 - 1

=> 2(1)² + (1 ÷ √2)² - 1

=> 2 + (1/2) - 1

=> 1 + 1/2

$=> \frac{2 + 1}{2} \\ \\ => \frac{3}{2}$

Answer 2

Hey there!

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Refer to the attachment for your asked question.