Question

Find the value of sina 30° - cos2 60° + tan45° - cosec45°.​

Answer 1

Answer:

Hi mate

Step-by-step explanation:

Sin 30 = 1/2

Cos 60 = 1/2

Tan 45 = 1

Cosec 45 = root 2

So answer = 1/2 - (1/2)^2 + 1 - root 2

= 3/2 - root 2

Hope you get it

Answer 2

Answer:

sina 30° - cos2 60° + tan45° - cosec45°

$= \frac{1 }{2 } - ( \frac{1}{2} ) {}^{2} + 1 - \sqrt{2}$

$= \frac{1}{2} - \frac{1}{4} + 1 - \sqrt{2}$

$= \frac{2 - 1 + 4 - 4 \sqrt{2} }{4}$

$= \frac{5 - 4 \sqrt{2} }{4}$