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Evaluate the expression without using a calculator.

0 votes

Evaluate the expression without using a calculator.

inverse-trigonometric-functions

asked Feb 2, 2015 in CALCULUS by anonymous

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2 Answers

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(a)

Step 1:

The trigonometric function is .

Consider .

lies in fourth quadrant.

Construct a triangle:

In fourth quadrant cot function is negative.

Solution:

answered Feb 3, 2015 by yamin_math Mentor

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0 votes

(b)

The trigonometric function is .

Let .

lies in fourth quadrant.

Construct a triangle:

In fourth quadrant cosec is negative.

Solution:

answered Feb 3, 2015 by yamin_math Mentor

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