Question

evaluate.............​

Answer 1

Answer:

ans.it can't get ans. without using trigonometry table.

Answer 2

Dear,

Before going through The Question lets revise few things.

1) Trigonometry is a science which deals with 3 sided angle, i.e TRIANGLE.

2) there are specifuc angles which have constant values and can be directly specified.

Now,

lets rock the question!!

BUT FIRSTLY LETS SEE THE VALUES WHICH QRE REQUIRED AND CAN BE USED DIRECTLY OVER THE QUESTION TO SAVE IT FROM A MESS!

• Cot30°= √3
• sec30°=2/√3
• cosec30°=2
• tan45°=1
• cos0°=1
• sin30°=1/2
• cos45°=1/√2

QUESTION:-

$\frac{cot30}{sec30} + \frac{cosec30}{tan45} - 2 \frac{cos0}{sin30} + {cos}^{2} 45$

PUTTING THE VALUES WE GET.

$\frac{ \sqrt{3} }{ \frac{2}{ \sqrt{3} } } + \frac{2}{1} - \frac{2}{ \frac{1}{2} } + \frac{1}{2}$

$\frac{3}{2} + 2 - 4 + \frac{1}{2}$

$\frac{4}{2} - 2$

2-2

=>0.

ANSWER!