Question

7. यदि sinA + cos A = 0 तथा A चतुर्थ चतुथाश में है।
sin A एवं cosA के मान ज्ञात कीजिए।
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Answer 1

Answer:

Given,

sin A + cos A = 0.

A lies in the 4th quadrant.

So, sin is negative and cos is positive.

Thus, - sin A + cos A = 0

Or, sin A = cos A

Or, sin A = sin (90 - A)

Or, A = 90 - A

Or, 2A = 90.

Or, A = 45.

cos A = cos 45 = 1/root 2

sin A = sin 45 = - 1/root 2

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Answer 2

Answer:

teri maa ola I don't understand your question shreya shetty