plzz solve this....as soon as possible..mam/sir

Asked by ABHILASHA | 5th Mar, 2019, 11:16: PM

Expert Answer:

c osA plus sinA equals √ 2 cos left parenthesis 90 minus straight A right parenthesis
cosA plus sinA equals √ 2 sinA
cosA equals √ 2 sinA minus sinA
cosA equals sinA left parenthesis √ 2 minus 1 right parenthesis
rationalizing
cosA equals sinA open parentheses fraction numerator √ 2 minus 1 over denominator √ 2 plus 1 end fraction close parentheses left parenthesis √ 2 plus 1 right parenthesis
cosA equals fraction numerator sinA over denominator √ 2 plus 1 end fraction

√ 2 cosA plus cosA equals sinA
cosA minus sinA equals negative √ 2 cosA
sinA minus cosA equals √ 2 cosA

Answered by Arun | 6th Mar, 2019, 11:11: AM