Question

cosec 390 Slove this question

Answer 1

we can directly used the value of cosec 30

Answer 2

$\bf \red{cosec \: {390}^{ \circ} = 2 }$

Given:

• $cosec \: {390}^{ \circ}$

To find:

• Find the value of given trigonometric angle.

Solution:

Formula to be used:

$\bf cosec \: ({360}^{ \circ} + \theta) = cosec \: \theta$

Step 1:

Rewrite given angle.

$cosec \: {390}^{ \circ} = cosec \: ({360}^{ \circ} + {30}^{ \circ})$

or

$cosec \: {390}^{ \circ} = cosec \: {30}^{ \circ}$

Step 2:

Write the value.

As

$cosec \: {30}^{ \circ} =2$

Thus,

$\bf cosec \: {390}^{ \circ} = 2$

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